Sorry I didn't mention regarding the intended purpose and expectations. Thinking along the lines of 347 or bigger short with aftermarket block. High flow cylinder heads, maybe Victors, carb style intake and a blower. Already in place is long headers, T56 close ratio 6 speed, 31 spline 8.8. Looking for 125-130 mph in the quarter.
I like torque, off idle, street manners, driving in high gear, highway and drag racing. Roll racing and high speed is not priority to me.
You are saying MS3 is plug and play? I thought I read the only plug and play was MS2 and I am not stuck on MS, in fact Pro M seems to have all the options I'm looking for covered like coil on plug, fan control, rev limiter, meth control and it is plug and play with Ford connectors.