What cam to use in a 318
Pistons are Sealed Power H814CP they are 1.755 compression height will get you to about .050 below deck depending on your block. Most replacements are 1.720. I had a minimum cut on the deck just to get a clean surface and the rest of the compression comes from the magnum heads. I am assuming .039 compressed head gasket. Stock magnum heads flow well will support 400 HP if you run a crazy large cam like a magazine dyno build. I have to get different push rods to use those heads so regrinding the cam to slightly small base circle is not really an issue. I am starting with a mopar cam anyway which is a slightly bigger base to start with.