Which heads to run on 340

I have been thinking about my 340

I have .040 overbore, stock compression for a 71 340 with J heads that have 2.02/1.60 valves 3 angle valve job

It does not like much timing and pump gas, timing was backed out and it still wanted to knock, so I have to give it a dose of Cam 2 to be HAPPY, More Cam 2 more timing better performance

IF you plan on using this as a street/strip car I would spend the money for a good set of ALUMINUM heads. With the 11:1 compression should be OK with good pump gas and even better with some race gas. Once you try driving it and having to pay $7.00 + a gallon for race gas then the extra cost on the heads make sense.

Have a ton of money in my J heads and should have spent the extra the last time the motor was apart for the ALUMINUM

MY 2 CENTS