Just to follow up, I got a reply from Comp Cams about getting their 280H Magnum with a 112 LSA ISO 110:
Tracey, we can help you with this for sure. We can grind that on what
ever LSA you would like. The 112 LSA will smooth the idle out a little...
And push the power band to the higher RPM side. It will also lessen the detonation threshold.
How much RPM are you looking for? Let me know and we will go from there. Thanks.
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COMP Performance Groupô
3406 Democrat Rd.
Memphis, TN 38118