Trick flow heads: different installed valve height

I hadn't thought of that. I guess I'm in the frame of mind where I want the components to match. I've watched your posts over the years, and I've come to respect your opinion. If you have time, maybe can can suggest a ring pack for the Mahle's. I like the fact they're lighter than most, to help with the reciprocating mass, and keep the use of mallory to a minimum.