Bigger valves in 302 heads?

If you yourself do the work to save the money, they can be worth the effort. I would do the larger valves and port the head. The performance level of the heads is more than the raw numbers suggest. Ma MoPar sold these heads when they found out they made 55HP more than the 360 head did.

As mentioned above, the newer set of heads available today make them a better deal than reworking the 302. If your paying someone to do the work o the head, it is a loss of money a d performance.

The 302 can be ported to a 340 size window and flow pretty nice.