LS + LT swap planner · 20 chassis · 20 engines · KMC Auto

Plan the swap.Skip the forum rabbit hole.

Gen III and IV LS or Gen V LT, one planner. Pick your chassis, engine, trans, harness and throttle. You get the mounts, pan, headers, harness, fuel, cooling and driveline parts free. The $24 Build Sheet adds the stuff that actually stops a swap: wiring steps, VATS and tune, fuel pressure, and a first-start checklist.

Start my swap →What's in the Build Sheet

Every line links to the vendor or tech page it came from. No account needed for the free list.

WORK ORDER · SAMPLE#0350

Gen IV LS2 (cable throttle) + GTO T56 → Nissan 350Z

Mounts, pan, headers, driveshaft Sikky Stage 2 package	$3,863
Gen IV DBC CANbus Pro harness Wiring Specialties, keeps tach + gauges	$1,395
T56 5.5″ relocation shifter Sikky, GTO cup	$560
T56 clutch master cylinder kit Sikky, for the GTO T56	$314
Fuel: 58 psi returnless	$400–900
Cooling + steam vent	$340–1,020

Key parts only$6.9k–8.1k

Sample shows key parts only. The full plan also covers clutch/flywheel, tune, hoses, fittings and more, so the real total is higher.

6 warnings

How it works

Five picks. One sheet.

Built for first-timers who don't know what they don't know, and for guys who've done it and just want the list.

Pick the combo

Chassis, engine (LS 4.8 through LT4 and L8T), transmission, factory-modified or standalone harness, and drive-by-wire or cable.

Get the parts list

Free: mounts, oil pan, headers, harness/ECU, fuel, cooling, accessory drive and driveline, with rough price ranges and a source on every line.

Unlock the Build Sheet

$24: the compatibility flags for your combo, step-by-step harness work, VATS and tune, fuel setup, and a first-start checklist you can print.

Pricing

The list is free. The know-how is $24.

Free parts list

Mounts, oil pan and headers for your chassis
Harness/ECU, fuel, cooling, accessory drive, driveshaft
Rough price range per line, plus a total
Part numbers only where the vendor shows them
Source link on every line

Build my free list

One build · one time

Full Build Sheet

$24one-time

Compatibility flags: 24x vs 58x, pedal and ECU match, AFM/DFM, LT direct injection, 8- and 10-speed TCMs, TV cable, pan and steering-box clearance
Harness steps for your harness choice
VATS and tune notes, plus exactly where to find them in HP Tuners
Fuel: pressure target, returnless vs return, Gen V lift-pump spec
First-start checklist you can print and tick off
Video walkthroughs from the shop (coming)

Start my swap →

No made-up part numbers

Every line shows its receipts.

Each fact links to where it came from: Holley, Summit, Speedway, Dirty Dingo, Sikky, Novak, PSI, LS1Tech and others. Each also carries a confidence tag. Anything we're not sure of is stamped for a hands-on review before it's treated as gospel.

Dirty Dingo adjustable LS conversion mounts, 2WD S10

$130–145listed

Clamshell frame mounts + Grade 8 hardware, 1.5 in of adjustment. Low-mount alternators won't clear the S10 steering box.

DD-LS-S2highdirtydingo.com ↗

Which 5.3s have AFM

—

lowNeeds Kolby checkhpacademy.com ↗

Chassis covered

20 platforms to start

The Builder

Every sheet is built by someone who's turned the wrenches.

350Z on the lift: stock drivetrain out, LS and transmission going in — Out with the stock drivetrain, in with the LS. The 350Z on the lift.

Kolby, KMC Auto

Kolby is the builder behind KMC Auto. He started out working for free at a friend's shop for years, then spent a few more years learning for little pay. He's now been a jet-engine mechanic for 11 years, the last 3 as a lead.

His builds so far:

First LS swap: white Nissan 350Z: LS2 and T56, both pulled from an '06 Pontiac GTO
Second LS swap: black Nissan 350Z: after the white Z was totaled, its LS was rebuilt fully forged and went into this car
Walk-around of the black Z, idling.
- Fully adjustable suspension from Z1 Motorsports
  Z1 Motorsports adjustable suspension
  Z1 Motorsports adjustable rear arms going in.
  Z1 adjustable rear arms installed, and stock arms vs. Z1 arms on the floor.
  Z1 adjustable rear arms on the car.
- Stance coilovers on all 4 corners
  Stance coilovers out of the box
- Akebono brakes from a newer 370Z, fitted with the Z1 Motorsports Akebono Front Brake Bracket Kit (350Z/G35)
  Builder's tip: "Be careful with your wheel setup on these brakes. Some wheels won't clear the Akebono calipers. I ordered longer wheel studs so I could run about a 10mm spacer and push the wheels out a little for better wheel-to-caliper clearance."
  Akebono brake setup
  Big brake upgrade up front.
  Akebono caliper on the Z1 bracket.
  Clearance check: caliper behind the wheel spokes.
  Longer ARP studs, about a 10mm spacer, and Muteki SR48 lug nuts.
  Old studs out, longer studs in the hub.
  Size check: stock base-model 350Z rotor in front of the 370Z Akebono rotor.
  The 370Z Akebono calipers and drilled/slotted rotors before install
- FAST 102 intake and Sikky intake tube
- Setrab coolers
- Granatelli Motor Sports spark plug wires.
  Granatelli Motor Sports plug wires
- MOMO steering wheel (suede, with red markers).
  MOMO wheel out of the box
  MOMO wheel installed in the black Z
- Griffin aluminum radiator (aftermarket)
  Builder's note: "Clearance between the pulleys and the Griffin radiator is tight on my setup. The new Sikky kit pushes the engine back 2 inches, which helps."
  Pulley-to-radiator clearance with the Griffin radiator.
- LOJ Conversions 350Z/G35 LS Swap Fuel System
- Z1 Motorsports aluminum splash shield (Z Speed 350Z Performance Aluminum Undershroud)
  Z1 aluminum splash shield, with the modified Ultra Racing subframe brace below it.
- Carbon fiber hood and fenders from Fly1 Motorsports.
  Builder's note: fitment was poor out of the box and took extra work to get right.
  Carbon hood and fenders
  Carbon hood and fenders on red wheels
  Close-up of the carbon hood and fender
  On bronze wheels with the bash bar and red calipers
  Carbon hood with the bash bar, front three-quarter
  Side profile on bronze wheels
- Front bash bar (brand unknown), bought online from a builder in Texas.
  Front bash bar, side angle
  Front bash bar, head-on, with the Sikky intake visible
- Ultra Racing (UR) aftermarket front subframe brace (the white bar), modified to clear the Sikky headers.
  Brace leg cut off to clear the Sikky headers
  Cut leg held up where it gets moved and rewelded
- Soul Function fender braces, moved over from the white Z.
  Soul Function fender brace, shown on the white Z before moving to the black Z
- GM ECU and harness wired by Wiring Specialties, with their CAN bus box
- ECU mount
  Not recommended: "Not something I suggest, but here's what I did: I took out the stock 350Z ECU to fit the GM ECU that runs the car. I pulled the cover off the GM ECU, welded the stock 350Z ECU bracket to it, and installed it in the stock 350Z ECU location."
  Stock 350Z ECU bracket welded to the GM ECU cover.
  Side view of the bracket and ECU.
  Stock ECU location under the dash.
  Harness routed at the stock ECU spot.
  The CAN bus box from the Wiring Specialties harness.
2008 Chevy Silverado: stock 4.8 out, a 6.0 he built himself in
Next up, 2015 GMC Sierra: L8T swap, replacing the 4.3 V6

Black LS-swapped 350Z on red wheels with red Akebono calipers — The black Z on red wheels, with the red Akebono calipers showing.

LS with long-tube headers and transmission on a stand — LS with long-tube headers, trans bolted up

Finished 350Z engine bay with FAST intake and Sikky intake tube — Black Z finished bay: FAST intake, Sikky intake tube

Black LS-swapped 350Z on bronze wheels — The black Z on bronze wheels

Black LS-swapped 350Z on red wheels — The black Z on red wheels

First LS swap: white Nissan 350Z

The first 350Z Kolby LS-swapped, using the LS2 and T56 from an '06 GTO. After the white Z was totaled, he pulled the LS and rebuilt it with:

Eagle forged crank and Eagle forged rods
Mahle pistons
PRC (Precision Race Components) CNC cylinder heads and a Texas Speed MS2 cam (238/242, .600/.600 lift, 112 LSA as stamped)
FAST 102 intake and FAST throttle body

FAST LSXR 102 intake, throttle body, and PRC CNC cylinder heads still boxed — Engine parts for the rebuild: FAST LSXR 102 intake, throttle body, and PRC CNC cylinder heads

LS block with forged pistons installed — Block with the forged pistons in

Long block with PRC heads and aluminum oil pan on an engine stand — Long block on the stand, with the PRC heads

FAST LSXR 102 intake bolted to the PRC heads — FAST LSXR 102 intake on the PRC heads

Dressed LS on the stand with long-tube headers — Dressed and ready, with long-tube headers

That rebuilt LS now runs in his black 350Z.

LS2 in the engine bay of an '06 Pontiac GTO mid-teardown — The donor: LS2 and T56 in the '06 GTO, before they came out.

Finished LS engine bay with 92mm throttle body, and the white 350Z on bronze wheels — Finished bay with a 92mm throttle body, and the white Z on bronze wheels

White 350Z from the front, hood up, LS in the bay with Sikky intake — LS in the white Z, hood up, with a Sikky intake.

LS and manual transmission on the shop floor — LS and manual trans on the floor

LS on an engine stand with aluminum oil pan and Texas Speed box — On the stand with the aluminum swap oil pan

Aluminum swap oil pan mocked up on the block — Aluminum swap oil pan mockup

Texas Speed cam retainer plate stamped 238/242 .600/.600 112 LSA — Texas Speed cam: 238/242, .600/.600 lift, 112 LSA (as stamped)

Underside of the white Z: aluminum swap oil pan, T56 and long-tube headers — Underneath: swap oil pan, T56, and long tubes.

Underside rear of the white Z: exhaust and rear differential — Exhaust run back to the rear end.

FAQ

Straight answers

Is the parts list really free?

Yes. No account, no card. You can put in an email if you want updates for your chassis.

Why are some prices marked "est."?

"Listed" means we saw that price on the vendor's page when it was checked (Oct 2026). "Est." is a rough range. Prices move, so always check the link.

Does it do LT swaps too, or just LS?

Both, on one site. Gen V LT engines (L83, L84, L86, L87, LT1, LT4, L8T) are direct injection with a cam-driven high-pressure fuel pump and an E92-family ECM, so the controller, fuel, mounts and harness are a different swap than a Gen III/IV LS. The planner keeps them on their own path and the Build Sheet flags DFM, wet vs dry sump, and 8L90/10L80 TCM matching.

What about the new Gen 6 engines?

GM has announced the Gen 6 L76 5.7, L78 6.6 and LS6 6.7. They're listed as coming soon. We'll add them once real swap parts and controllers exist.

Will it guarantee fitment?

No. It's a planning sheet built from vendor and tech sources. Confirm fitment with the vendor, especially on pans, headers and steering.

What do I get for $24?

The full Build Sheet for one combo: compatibility flags, harness steps, VATS and tune notes, fuel setup, a first-start checklist, and video slots. It's printable and has a link you can come back to.