[Double Venom]

GAS40,
Bugged me all night. Thinking I may have read your question wrong? On all small blocks - from the four-tube flange on the header ( bolts to the side pipes) is appropximately 2"s away from the footbox frame!
Did this answer do it? If it is much closer then checkl to see if you have the right motor mounts. Moving the mounts on the frame is futile and the wrong answer.
DV
Hope this helps.