Originally posted by techinspector1
By dr_bowtie: "head gasket shims...."

dr, where I was going with this is that the motor probably has no squish due to excessive deck height and too thick gasket. If the squish was tightened up to 0.035" - 0.040" by zero decking the block and running a 0.039" gasket, he should be able to run pump gas without detonation. Shimming the heads up further from the deck is only going to make the situation worse.
What is your suggestion on this? As far as changing head gaskets thats not a big deal. Just finding out what to use