Suggestions for the Best Comp Ratio, Pistons & Cam for Street 340

To get 9.0 - 9.5 compression, you will need a clearance volume of 88.1-83 cc.

Your heads and gasket will pretty much take up the 83 cc clearance volume.

You want to find a flat top piston with the top even with the head deck, or with even with 4-5 cc valve releifs to get your desired compression with the heads and fel pro head gasket that comes in the mancini racing gasket kit (12.4cc).