Low vacuum reading

Timing, as they say, is everything. This 383 likes 16* initial- vacuum is at 15" now. Got mentally prepared to weld up the advance slots and start trial and error adjustment to limit the mechanical advance. Pleasantly surprised to find out the motor has a MP distributor and adjustment is as easy as loosening 2 screws and moving the limiting plate. Sweet! Got total advance dialed in at 36* and it runs sooo much better now. Thanks guys....