302 heads

"just a fun driver" is quoted from the topic starter's post.
Which would most likely mean the cam chosen won't be anything above .500" lift,
Most likely a hydraulic cam.
Which also might cause the engine hardly to see any action above 5K rpm.

I don't see the 302's as 'bad' rightaway here. But.... the 9-9.5cr requirement will put them out.
And.... don't all 340 pistons end up sitting above deck? That would kill off any closed chambered heads as well I would think.