Recently bought an MSD Digital 6A box, "pro-billet" ditributor, blaster coil, + MSD wires for my car. It's a 72 Satellite that had a points style distributor stock.
The directions for the Digital 6A box say not to use a dial-back-to-zero timing or digital timing light.
Any idea why this might be ? Why would it not be accurate [?]
The only timing light i own is a dial back to zero style.
Am hooking up components today, and would like to set initial timing.

stock 1972 400" 2 bbl motor, with a 4 bbl manifold, holley 4bbl, stock exhaust manifolds, with dual exhaust, and camshaft specs are -214/225 .449/.464 @ .050

Thanks

Yeah, the multiple sparks at low RPMs give a false reading to some dial-backs and digital lights{mine included}...Craftsman{Sears} has a cheap standard light if you need one without too much effort... ..

What Screamin said but might try it w the knob on zero & see if it acts good and can mark the dampener to get more than the tab will normally show you, use the spaces between the tab marks for a ruler to make addit'l marks on the dampener to the right (CW) from the O TDC slit or .0632683" is 1 deg so 1" around the circumference is 16 deg

Thanks gentlemen for helpfull answers !

Bring the engine up to 3200 RPM and there is no multiple spark on MSD, Mallory or Crane.

My SnapOn dial back works with our MSDs.Some will some wont.Rocky

my Craftsman works ok with this. only problem i had was i tried solid core wires once. BIG mistake!