My home inspection of Speedmaster heads

Agree. I would imagine the valves are all pretty close to the same length. The valves are just steel and not stainless I assume?
yes, and I can see people buying the bare heads for about 420.00 and loading them up with nice hardware. Problem is if you have to pay a machinist to perform some of the work, then the money gets lop-sided in favor for "loaded heads" to a DIY guy like myself.