Bypass the MSD, set timing, reconnect MSD. It wouldn't run at 40BTDC, period. It's your equipment. If you are lined up at #1, have the gun actually tapped to that wire, the balancer is verified not to slip, and it's truly at TDC that's all you need to know. Unless you have the distributor clocked wrong or reading the wrong wire that's not possible.
rjp
__________________
AOC/Hogg 2028
|