Hey Guys. I’m getting ready to buy a 350 SBC 5.7 Vortec for my 91 camaro to upgrade. I’ve been doing a lot of research on what all will need done. I’ve been hearing a lot of conflicting information on what will actually need done. i’m going to go over what I’ve heard and hope I can get some clarification from some people who have done this before.
The biggest thing for me is the ECM. I’ve heard the original can be reprogrammed to work with the 5.7. I’m not sure if the original will work and if so what all would need done for that. I also wonder about the wiring harness if I would need a new harness as well.
I currently have a 700R4 auto Transmission and from what I’m reading that should bolt right up to the new engine. I’m not sure how well it will handle the added power in this car.
From what I understand, I will need to get V8 motor mounts that should bolt right up to the subframe since these camaros did support the 5.7s.
I know at some point the rear end will probably need upgraded to handle more power.
I plan on labeling all sensors since I’m hoping they will all be or at least most will be compatible with the new engine.
I’m not sure about accessories such as power steering, AC compressor and the alternator. I’ve heard most will be compatible with different brackets.
I’ve heard that the 3.1 radiator should be compatible with the V8 radiator.
Another biggie is that I’ll need to upgrade the front springs to support the heavier engine (This will need done anyway since my shocks aren’t the best right now)
I’m not sure if a different starter would be needed although I wouldn’t think so if both engines can bolt to the 700R4 transmission.
I may be forgetting things and I may be way oversimplifying the project. If I am please and input I can get would be very helpful. Also any additional tips to help make the project easier for myself I’d love any assistance. Thanks Guys!