Thanks Spectra. I was told the 377 with Imco exhaust would push a RC to 70 but have a hard time accepting a small block with that number. I was originally set on another stoker, the 22 this time but the insurance is thru thru the roof so I'm looking for good performing v bottoms in the 21-22 range. So far the Vector and the RC and happen to run a year old RC with a 377.