If you start at 30 degrees total timing and go up 2 degrees at a time, you should be able to find the spot where the plug strap coating is burnt off just at or slighty past the curve towards the base of the strap...


For my Indy -1 heads that turned out to be 34 degrees total using NGK -9 heat range plugs.

What nozzle/pill are you starting at, and which pump? Mine is the black 0 -1/2 gear pump.

Keep us posted!

Arnie

67 Cuda 8.48@ 158.7 mph 1.18 60' 2,600 DA(so far...) 70 Super Bee 440 Six Pack 4-speed. 13.2 @ 104 Stock exhaust/Street tires.