I have a pair of junk 502 motors (cracked blocks) and may have a line on a pair of 454 mags. Will the 502 Mag fuel system and electronics work on the 454 or is it a totally different fuel curve?
Thanks

I'm fairly confident it would work but would be mildly on the rich side. Other than displacement (CID) the two motors virtually identical. Same VST, throttle body, manifold etc.

Hmmm, with so many known components I'd be tempted to mod the ECM myself. Find a copy of the stock 454 tune and get to it.