| Tool Type | Example | Best For | | :--- | :--- | :--- | | | LS1Tech, Honda-Tech, R3VLimited | Real-world "it fits" proof | | Swap Kit Sites | CX Racing, Sikky, Holley Hooker | Knowing if a kit exists (if yes → high compatibility) | | AI Checker | ChatGPT / Claude (with web search) | Asking "What engines fit a 1995 BMW E36?" | | Parts Cross-Reference | RockAuto (compare part numbers) | Checking clutch, flywheel, or starter compatibility |
"Act as an engine swap expert. I have a [YEAR] [MAKE] [MODEL]. I want to install a [DONOR ENGINE]. List conflicts for: motor mounts, transmission bolt pattern, oil pan clearance, and ECU compatibility. Include at least one known swap kit manufacturer." Part 4: The Compatibility Scorecard Score your potential swap 0–5. Need all five green lights. engine swap compatibility checker
| Category | ✅ Compatible (3 pts) | ⚠️ Moderate (1 pt) | ❌ Incompatible (0 pts) | | :--- | :--- | :--- | :--- | | | Bolt-in (same chassis) | Adapter plates available | Weld custom from scratch | | Transmission | Direct bolt | Adapter plate + custom flywheel | No adapter exists | | ECU/Wiring | Plug-and-play harness exists | Need standalone ECU | Requires donor car's entire electrical system | | Oil pan / Crossmember | Clears | Notch crossmember | Must dry sump ($2k+) | | Steering / Header | Off-the-shelf headers | Custom header required | Header hits steering shaft | | Tool Type | Example | Best For
Want to check a specific swap right now? Reply with your chassis and donor engine. List conflicts for: motor mounts, transmission bolt pattern,
