Depending on the porting and other factors, you should be close. 4V valves in the 2V heads really actually hurts the flow on the intake over about .450 lift. Also port matching the heads to the intake helps a lot as the FelPro intake gasket and the Weiand have the same port size, which is bigger than the stock 2V port.
As for raising the power - better heads, better intake.
<font size=-1>[ This Message was edited by: ckelly on 9/25/06 1:46am ]</font>