Better heads

To me the 302 heads are very hard to beat on a 318, I have a set on the 322 engine that makes an average of 466 HP and peak HP is 501 on pump gas and 535 on alcohol. Last time out I ran a 7.384 @97 MPH lifting as I caught the guy at half track and just road with him to the finish line. On this run the engine put 355 HP to the ground but theres more left in it yet. The air flow in the heads show to be good to about 375 HP net. This is with a air correction of 1.051 for HP, so 355 X 1.051 = 373 HP which means I'm getting about all you can to the ground from a set of 302 heads. Without any aftermarket parts.