Need Vacuum Advance and Distributor ID please

[studefan]

My vacuum advance on my 1963 Lark doesn't work any longer. The distributor is not original to the car, is single point, and may even be from a different year. It's mounted in a 289 engine and it ran fine for many years. Here is a picture of the distributor. What kind is it?



Here are pictures of the vacuum advance. Can you please ID the vacuum advance also as I need to replace it. Number stamped on it reads VC725. Where can I find one of these vacuum advances? NAPA doesn't have any.





Thanks so much for the help. Jeff

[bezhawk]

It is a Delco. The coveted window type from a 61 Stude. You can use most Chevy/GM parts from 58-mid 80's when HEI came out.
The stock vacuum advance should be available from SI. However, if not, then get an adjustable vacuum advance for a small block chevy, and dial it in for your engine.

[Dick Steinkamp]

SI doesn't list them, but still may have them. Their Prestolite and Autolite ones are $125

Being a CASO, I'd probably just get a Chevy one...somewhere around the early 60's like this...

eBay Chevy vacuum advance

Your FLAPS probably has one for $10 or so.

IMHO, it doesn't need to be EXACTLY the same spec as a Studebaker one. It's role is to add about 15 degrees of advance at high vacuum conditions like part throttle cruise to improve fuel economy.