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What does it take to run eagle heads on a stock bottom 6.1. With them being closed chamber I've read it takes compression to 11.3 to 1. I believe stock 6.1 is 10.5 to 1. Wondering how much of a gain. I have a set of both 6.1s and eagles ready to be sent out for cnc machining. Wondering if I can gain a worthy amount putting ported eagles on vs the 6.1s. I see the flow very similar numbers. But the added compression should add some power. No?

FYI eagle's require longer push rods and different valve covers.