Everything you need to drop a 5.7L Gen III Hemi into your classic car. Mounting kits, crossmember solutions, fuel system, wiring, cooling, and drivetrain — all documented by someone who's done it.
This isn't a teaser. Every section is written to the point where you can execute without a second opinion.
Determine what you have before you buy anything. Chassis identification, frame rail clearance, transmission tunnel width, crossmember interference — covered for all common classic platforms.
Every major swap mount option evaluated: Energy Suspension, Borgeson, mounts from Holbrook, ACC, Detroit Speed. Which ones fit, which ones don't, and how to modify what doesn't.
The Hemi runs sequential injection. Your tank needs a return-style system — in-tank pump, -8AN feed lines, -6AN return, FPD or similar regulator. Line routing, fitting specs, and what kills a fuel system build.
Gen III PCM pinouts, fuse/relay box location, harness routing through the firewall, OBD2 diagnostics port placement. Includes guidance on whether to use a standalone ECU or work with the stock PCM.
Hemi coolant temps run hotter than old small blocks. Radiator selection, water pump bypass routing, thermostat bypass lines, heater core integration, and shroud sizing — so you don't overheat on your first drive.
Transmission options (T56, 6-speed auto, 4L80), driveshaft length calculation, transmission crossmember modification, shift lever relocation, and how to handle the reverse light circuit on the Gen III TCM.
The guide includes a complete, categorized parts list with brand recommendations, part numbers, and sourcing notes. Here's a sample of what you'll find:
| Category | Part | Recommendation | Notes |
|---|---|---|---|
| Engine Mounts | Energy Suspension 3.1109G | Polyurethane — holds up to boost. Check alignment shim pack. | |
| Crossmember | Holbrook Swap Crossmember | Confirm application. Some B-body cuts required. | |
| Fuel Pump | Walbro F90000267 (450 LPH) | Required for hemi swap. Return-style system. Check filter sock length. | |
| Fuel Lines | -8AN PTFE Braided (Feed) | -6AN return. No rubber — ethanol breaks it down. Earl's or Fragola. | |
| PCM | Mopar PN 56040165 (1999–2003) | Pre-programmed for 5.7. Verify VIN matching rules in Chapter 4. | |
| Radiator | Summit Racing SUM-161001 | Dual-pass, aluminum, fits most B-body and A-body. Verify inlet/outlet position. | |
| Transmissions | T56 Magnum / 4L80 / 6L90 | Each has trade-offs — full comparison in Chapter 6. |
Full parts list with part numbers, sourcing links, and budget alternatives in the guide →
Customers have used the guide on a variety of platforms. These are documented build photos from completed projects.
Have a completed swap? Email photos to DieselNomadNm@gmail.com and we'll add it to the guide's build gallery.
"I've been wrenching for 20 years and I've never seen this level of detail in a swap guide. The fuel system section alone saved me three weeks of trial and error."
$50 for a guide that saves you weeks of misdirected work and the parts that go in the trash when you order the wrong thing.