unless you are going all out with this engine, larger intake valves are a waste of time. the velosity will be killed with the larger valves. exhaust valves should be enlarged but that is it. there are many threads on here reguarding "302" cast heads. look some of them up, then if you still have doubts contact or study some info found on "bj's" site."bjr" is the small block expert on here....
http://www.forabodiesonly.com/mopar/showthread.php?t=19556
http://www.forabodiesonly.com/mopar/showthread.php?t=28974
http://www.bjrracing.com/small_block_heads.htm
