Actually considering a GM V8 conversion on my Proton. Done a ton of research and investigation and it looks like it is possible. If i did this i would be tubbing the rear as well. Just my old hot rod blood from the 60's is getting the better of me. The swap does intrigue me.
Scott
I've now looked at doing a mini-tub on rear for a bit wider tires on the back for when i do the V8 conversion. Hope my plans aren't too far fetched.