ProComp/Speedmaster aluminum heads

I look at it this way......
If your budget is Speedmaster heads, and not TF heads....... the choice has already been made.

Plenty of people are using them.



Bolted on right ootb?
Agreed, and I have the tools to take the springs off and feel if the valves seem sticky in their guides and I can pour some solvent in the holes and see if they hold. And at that point call Speedmaster and then ask what the deal is?
My cam is only a 506 526 lift with .019 Lash with Hughes 1.6 to 1 rockers. I can't imagine the springs that are supposed to hold a 600 lift are going to be any problem even if I step it Up to a 573 lift which I was considering..
Thank you again for chiming in with your hands on experience with these heads. I am trying to create a spot here where someone can say they got a good experience or bad one from them.