Distributor shaft length
I have a duel pick up distributor with a vacuum advance. The distributor fits could I use it for now till I get another. I'd have to wire it though. What are your guys thoughts on this duel pickup
Not sure I knew that or not. You have to be careful. One or the other of the pickups is likely to suffer what is known as "ROTOR PHASING" problems
That is, the "wrong" pickup will not generate the spark when the rotor tip is aligned with the distributor cap contacts.
Google it. There are a bunch of various posts on the www
[ame="https://www.youtube.com/watch?v=aWMlNwGW0tM"]MSD Tech: Rotor Phasing - YouTube[/ame]
You might ask, "if one pickup has phasing problems, how was it ever used?"
Answer: That pickup was run through the fuel control computer, and controlled the spark advance by DELAYING the pickup electronically
This problem, phasing will actually be true of ANY dual pickup unit, vacuum or not. I hope I have not suggested something that will lead you off track
You mentioned you have a distro with locked advance. If you know that this once worked properly it would be a better choice.