I have a 27 roadster. I can get the IC that I want right now but I might need to go a little higher, not sure without a little more testing. This is just something I have been told and have read in other tech posts but never have seen why.
My car hooks initially but sometimes gets loose about 100-200 feet out. Tough to dial not knowing if it will stay hooked or not. Not a very fast car so it suprised me that I could spin 16.5-33s only running 6.0s with a sbc.
Curtis