ProComp/Speedmaster aluminum heads

MOPAROFFICIAL said

Get into the .575 range.
Engle KV3 solid

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The cam was ground from its original 464 purple performance cam to a Oregon cam grinding solid lifter number 175 cam. Which is a 107 lobe separation 259 267 @50 with a 546 566 lift with 1.5:1 rockers. The next year after the motor was built I took the heads off and took out the 1.88's and put in 2.02's and Hughes 1.6:1 roller rockers and that yielded a 586 - 603 lift...
Likely too much lift for my head which probably would work a lot better with the SM's but..
I definitely don't want to go back to that cam it did not idle.. it ran as wicked as it sounded, but it idled like crap.. which also sounded real cool but....