Hey guys, new here. I have a 1963 Chevy Impala with a 350 sb. I'm pretty sure I need a complete rebuild on it, but the guys down at the shop have a 327 available to drop in if i want to go that route. The fact is, I don't know a whole lot about 327's and am not sure what to do. Should I rebuild the 350 or just buy another 350 crate? Or go with the 327? Im looking for a good balance of fuel economy and muscle. HELP!!!!