Low compression 340 VS high compression...

RustyRatRod said

I see your issue. Those pistons are not zero deck height. They are positive deck height. This is them right here. You cannot do this without a dial indicator and piston stop to find true TDC. You're below deck.

[URL][URL]https://www.summitracing....YgIzy5R6lyvAo76N21T5_d4rKC9fqcUgs56BD7W_aB9aQ[/URL][/URL]

Click to expand...

Those do look like what I have. I put a straightedge across the deck with the piston at TDC and it sure looked like zero deck to me. It wasn't like the straightedge sat above deck either while resting on the piston.
I'm in the house now, the engine is out back in the shop. I usually do post up pictures for stuff like this, sorry if I am making it harder to help.