Good question. Never thought about 5 speeds. I'll say take the .3 tenth hit for a clutch car. A 4 speed car would be better geared as well, so my thought is subtract 3 tenths for a clutch car and call it good. Actually, there are differences in 1st gears in the automatics as well. Yeah, my vote is take 3 tenths off for the clutch car and it's one area of the penalty box that worked in your favor