If at all possible I would like to keep my current tranny. But my truck is a 94 5.0L with MAF. So if I can get the right flexplate it should work. The computer will just think my 302 is sucking in a little more air and give it a little more fuel, right? And what about the firing order of a 302 compared to 351, will my fuel injection system be off at all?

 

just have to change the firing order on the plug wires. but yes your ecu wont care that its a 5.8 one bit.

 

The injector order should be changed - it'll run w/o it but it should be. It can be changed by swapping the wires on the computer's connector or internally by a dyno shop with tuning software.