Took the '36 for test drive and it stumbles during acceleration, or at rest. Compression is good at 125-140lbs, no smoke but plugs sooty. Cam is L-100 with Edelbrock 500,re-jeted to .083 mains. Mallory electronic set up by Bubba's. Have no timing marks on my crank pulley but have TDC mark for #1. Vacuum is 13-14", am told this is acceptable for this cam at idle. Other than the very rough running, car steered and stopped great, CE front & rear end kits with discs in the front, Ford 8" in the back. Any suggestions on where to begin appreciated.