[bobcowan]

Since you already have that engine, buying another crate motor is probably not feasable. But that engine isn't designed to make real power. You'll have to make some significant changes to make significant power.

First thing to do is new heads. Those cast iron heads and low compression will never make good power numbers. bigger ports, bigger valves, and a matching intake and carb.

Second is the cam. pretty weak.

You'll probably be time and money ahead to sell the current motor at a loss, and buy what you really want.