Head Gaskets???

Thick or Thin head gaskets? Can I get some input on which ones I should run? Is this a controversial topic? If not I'll start a new thread with a more controversial topic :rofl:

Engine - 1968 340
Pistons- 30 over TRW pistons that are avg of 12 thousandths over? (I think that's how it was stated)
Heads- heavy *** X heads
Springs- comp 901
Rockers - Stock
Rods- straight pieces of metal that are stock?
Compression- pictured below 135-157
Camshaft- Summit 1789 (cam card pictured)
Hooker comp headers
RPM 7576 Air Gap
2.5in exhaust

Need anything else?

The car had some engine tech 7J gaskets on it (measuring thickness tomorrow) and I have some felt pro 8355pt which are .053 thickness. Or should I get thinner head gaskets?

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