My 460 has 2 600 cfm vac sec holleys now. Interested in upsizing but don't want to buy new because they'd be for short time use. The engine is low compression, dished pistons, d3 heads. I don't have cam numbers but it's got a lot of lope to it, I know bad cam info!! Question is... 2 750 dp or could I get away with 2 850 dp. I know I didn't give much info, don't really know what to provide. Please ask what ever you need. Thanks!!!