A good friend (in his mid 70's) has a 39 Chev Coupe with a 454. Every time we visit he bemoans the 454 while wishing for a 350. I recently mentioned a LS1, however he's a points and carb guy so that ain't gonna happen. His dissatisfaction has even led to considering a 250 which I do think would be nice. Plenty of power, add Vintage air and cruise on. Only thing is it doesn't have the BadBoy street cruiser look.