I'd put as much initial timing as you can without causing the starter "grunt" when cranking. Also total timing should be around 32-36* by 3,000. run what you can without pinging.
I don't know about high elevations but at sea level here in nor cal I ran 12-14* initial and 32-36* at 3,000 on my 383 in my pickup. I also used a adjustable vacuum advance unit set for 12-14* at cruise on top of the 32-36* advance.
I don't know about high elevations but at sea level here in nor cal I ran 12-14* initial and 32-36* at 3,000 on my 383 in my pickup. I also used a adjustable vacuum advance unit set for 12-14* at cruise on top of the 32-36* advance.
