I have a 65 Nova 283 that I may someday decide to use. If I decide to go with the V-8, I think I would rather beef it up some. Does anyone have experience punching a 283 to 4' bore? Seems like it could be done; but I think I have heard that the casting might be too thin. I would hate to find out that I ruined the block doing that. I know the old 283's aren't all that desirable but a true nova block with the recessed oil filter mounting is getting hard to find.