Well, I'm guesing on the head ccs and the actual deck height of the pistons. If they go in at what i'd say is average, they'll be in at .020 down or so. Guessing again on the inbtake valve closing point at .050 lift, I get a static of about 9.6:1, and dynamic of about 8:1. If they are at 0 deck, the static goes over 10.1:1 and the dynamic goes to 8.4:1. So it will depend on the deck height, and your cam choice as to whether or not it is pump gas friendly. I wouldnt run the Edelbrock cam. There are muc hbetter out there, and I'd sacrifice static ratio for a better cam.