Piston Class is in !!

AJ/FormS said
I'm more confused than ever

OP said 340RPM heads.
With the .060 relief cut
To make room for the nominal, +.045pop-up, 340 domes.
leaving .015 clearance..... plus gasket thickness
is about .054 with an .039 FellPro, or .045 with the .028 gasket.
mathematically speaking.

Where's the problem?

Im just curious if the Edelbrocks chambers were different some how and wouldn't permit the Trw dome to work if thats not relevant and the clearance is there then it CAN work .