Interesting numbers, My 9-1 engine wouldn't pull past 5000,mildly ported 452s 900 carb 36 degrees 509 hyd. Gotta be the cam I guess. Ran 7.50 in eight, big 64 savoy, 14/32s TA 3800 vert ,ladder bars. Always figured it was a comp. problem. I Run 93 pump gas.