I have the timing wrote down. Let me find it and I will get back. Thanks. What should initial timing be on a mild 360?Looks like stock electric ignition
Getting the timing to match the compression, chamber efficiency, cam, and rpm under load is the most important thing.*
Factory initial on most 360s was tweaked to reduce various emissions. They made up this with a quick advance above idle rpm. If stuck with one of those distributors or one like it, sometimes using manifold vacuum on the vacuum pod is a simple workaround. it has to be fairly stable. If the manfold vac us bouncing around then the vac adv and rpm will be bouncing aorund.
A better fix is what Rockable did here later in thread.