Chevy Nova stalling when put it in gear. 355 with comp xe 268 cam with BM 2400 stall. Pulling 14lbs vacuum in park drop it in gear drops off to 7lbs. The car runs fine other wise. Off line pulling thru gears at 5800 rpms. Never skips beat from dead stop. Idel set 1200 rpms. Drops to 4-500 rpms in gear sometime it just stalls. Not as bad when car up to tempature. I did try to richen up at idel backing mixture srews out half turn.