Yeah, sorry I am not explaining it very well, but it seems you have the idea.
I hadn't thought of the fact that you can have different valve length/installed height combinations. I was just trying to figure out a way to determine if my valve stem tips were lower than they were supposed to be, and spring height seemed like a good idea.
Yes, these are definitely 1974 #46 heads. The casting date is J223. They came with my 74 GTO, but I have no need of them for that car. They have screw in studs, not press in. There is nothing but the guide plates under the studs. I used standard Fel-Pro head gaskets. I can't think of anything other than the length of the valve stems that would cause this issue. I really don't want to remove a head and measure a valve (and even if I did, and found that they were too short, I can't afford to have the heads re-done with the proper valves), so I plan to go adjustable valvetrain...I just ordered my ARP studs.
Thanks again for the help!
Importsmasher
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