...I've got an 850 Holley Double Pumper on my 415 small block with AFR Aluminum Heads {195's with 2.05 intakes & 1.625 exhaust}, 10 t0 1 compression, cam is 224/234 with 515 lift {Hyd. lifters}, 1:6 rockers. Thats the size carb my engine builder recommended so thats what I got. My motor is a low RPM Tq. motor {for the street}. Sounds like you've got more of a high RPM race motor {don't know if that makes a difference or not..... At this point all I do know is that its 3 am in the morning and I'm TIRED.... goodnite, Bill....
ZZZzzzZZzzzZzzzz......