I have the TW CNC TEA ported 185cc heads and they are a very good flowing head. Now you can buy the CNC ported version directly from TF When I built my engine they where the highest flowing 185cc head out. Slightly higher than the AFR plus you get the rotated valves which also improves HP. I would not want to go bigger than 185cc intake to keep velocity up esp. with a 302, makes for better torque down low. With many of the heads listed you might have to get port matched but that is something you can do at home(not necessary but worth the time). Another good thing about these heads is if you go with a bigger displacement engine you can have them CNC ported to 205cc by TEA. MM&FF recently tested these on a 408 stroker and made more HP than the AFR 205. There are lots of choices in the price range you are looking at and lots of flow data charts on the net.