I know it can be done, I was considering doing a 350 swap into my 4cylinder, ONLY because I had a 4 cyl. mustang and an old 87 chevy 350 laying around. (Guys, don't hate please!!!) AJE racing makes a tubular K-member with interchangeable engine mounts, that can fit 5.0s, 5.8s, 5.7s, LT1s, and LS1s. It can be done, but not very cost effective. Take in mind that you would have to get a custom bell housing/ scatter shield, use a chevy pressure plate with a matching ford clutch disk (custom sizing), different length drive shaft, and if you plan on keeping the chevy engine EFI, I can't even think about all the custom wiring that it would need. Also a laundry list of other odds and ends that would have to be changed/modified. Just stick with Ford IMHO!