Cam 'em to the moon.......just like my old stock 440SP motor at around the 10:1 mark, probably only 9.6 with the old CC .650"/290@.050 solid (not supposed to work), ran like a demon with stock 906 heads, did nothing else but bolted on a pair of 2.14 BV 906's (nothing special cfm wise) on and it picked up nearly 7/10ths and 7mph and only turning around 6600rpm.....what would it have gone like with some 320cfm Eddy's?....we'll never know.