Need a stroker kit for my 340

You did not specify if you are looking for a forged or a hyper piston. Assuming you are looking for a hyper piston it may be a bit harder to find in .040" over which will give you 418" instead of what most sell as a 416 or .030" over in a kit. I have .040" Forged Diamonds #51412, but mine are -21.5 cc dished as i have Edelbrock magnum heads w/ 58cc which comes in @10.69:1 ratio. If you used the #51010 Diamond flat tops w/-6.8 cc you would come out w/ approx 10.2:1 this is assuming your heads are 76 cc. Did you measure them. The #51412s like mine would give you slightly less than 9.1:1 w/ the 76 cc heads. Kinda' between a rock and a hard place. You would have to know your deck height and combustion cc to make a descision. Ross,JE and others have other options also. With todays swill fuel you don't want to go too high on compression.

Glen