How much will 70cc heads raise my compression? Also how much lift?

With the RSR static compression calculator, .039 felpro gasket I got 8.9:1

with a .020" shim gasket I get 9.26:1 - if it all fits I'd go this route

If this is a budget build I wouldn't waste a ton of money on expensive head gaskets - the shim's are $25, and the Mopar's are $63 (<- $80 Felpro's)