timing gun

Snap On MT 2261 digital timing light in very good condition in the moulded plastic case everything there except the instruction manual sure this can be found on the net but its not that difficult to work out cost £350 new NOW SOLD

Hi Here's another novice question (I'm learning, I'm learning!!). I've set the timing on my 1974 twin carb engine with a test light wired to the coil and moving the dizzy with the crank set at 7.5 BTDC. I've heard that I should use a timing gun to get a more accurate timing. How do I use a...