340 Heads Recommendations- Aluminum vs Cast J

Scody21 said
If they are the 2.02 j heads and are crack free. Just run them.

My current set up is 340 .30 over with 10.2-1, comp XE285HL, roller rockers, stock airgap, 750 DP with 2.02 J heads, right at 390HP per a superflow 901 dyno.
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That’s respectable, I have the smaller 1.88 J’s