I wouldn't use either, unless you have a 3000+ stall and 3.91's or better. Much better cam choices out there. Also DO NOT use the Eddy 750 if you must use an Eddy carb use the 800. For general street use I'd go with a modern split duration cam w/ a 110 or better centerline. Something in the 230-240@ 50 and 500-510 lift.