Would a v8 trans am engine fit in v6 firebird?

No, a V8 Trans Am engine will not fit in a V6 Firebird without significant modifications. While both are F-body platforms, the V6 Firebird has a smaller engine bay designed specifically for the smaller V6 engine. A V8 requires more space for the engine block, headers, and associated components. You would need to modify or fabricate numerous parts including potentially:

* Engine mounts: Completely new mounts would be required.

* Firewall: May need to be modified or replaced.

* Bodywork: Hood, possibly fenders, and other areas may require modification or replacement to accommodate the larger engine.

* Transmission: The V6 transmission won't handle the power of a V8. A V8-compatible transmission and driveshaft would be needed.

* Wiring Harness: The wiring harness would need to be adapted or replaced.

* Exhaust System: A completely new exhaust system would be necessary.

* Cooling System: The V6 cooling system is inadequate for a V8.

The amount of fabrication and modification required would be extensive and likely cost-prohibitive compared to simply buying a V8 Firebird.