350 Chevrolets there were many of them of varying horsepower 2 and 4 barrel, same with the 327. A 327 in a Corvette wasn't the same 327 in your aunts Biscayne... 340 only ever came with 4 or 6 barrels LOL! it was a performance offering only. Chevys are good viable contenders, but you have to know what ya have. I have always made it a point to start with a good engine vs trying to ,for example make a 307 chevy a performer. I wouldn't even start there, the 307 would come out and a good HP rated 327 or 350 would get built and put in.
