Tom Langdons distributors are not from Atlas engines. They did not use dist.
I think they are from early 80"s chevy citations and such with a 2.8 V6, when they still had vacuum advance. Hard to find now.
Anyway. Can you take a picture of the weights in the distributor?
I think your advance should come in faster.
It should start moving at around 1200 and have full mech timing at the top of your cruising rpm on highway.
So you need to know tire height, trans and rear ratio.
You also need to know the timing characteristics of your engine.
These engines tend to like timing in general.
Idle with vacuum around 25-26
WOT with no vacuum 34-38
Cruise on HWY with vacuum 44-52ish
I'd suggest buying a spring kit for the weights. Use one of the lightest springs and a medium spring on your weights. See how that changes it and report back.
