Too many variables left, and LSA wouldn't be the first consideration. But,...assuming oem iron heads with a little bowl work, the quickie combo would be something like a Comp XE262, with a 1.6 rocker and correct geometry. That grind is on a 110, and will have decent area under the curve, and build cylinder pressure in a usable rpm range with the low static CR. Obviously, a better combo could be had, but it takes a lot of info to make the best choice.