67/68/69 cuda dilemma
Well I did a little caliper measuring and also feeler gage and straight edge measured the TDC of the old pistons before removal and they were .080" in the hole at TDC. The new ones are KB167s at current deck height if my math is correct they will be .009" in the hole at TDC. The block will be surfaced probably .004" -.005" to clean up the gasket surfaces. The CR calculator I used puts this .030 overbore 318 with the 302s and felpro permatorque gaskets at 9.33-1 CR . Unless I decide on thinner steel shim headgaskets. Should be just fine. I need to do a CC check on the heads to get an exact number, but it should be close.
Well I did a little caliper measuring and also feeler gage and straight edge measured the TDC of the old pistons before removal and they were .080" in the hole at TDC. The new ones are KB167s at current deck height if my math is correct they will be .009" in the hole at TDC. The block will be surfaced probably .004" -.005" to clean up the gasket surfaces. The CR calculator I used puts this .030 overbore 318 with the 302s and felpro permatorque gaskets at 9.33-1 CR . Unless I decide on thinner steel shim headgaskets. Should be just fine. I need to do a CC check on the heads to get an exact number, but it should be close.
