Help needed for diagnosis - pictures inside

well my suggestion is to hook up the vacuum advance :D

it's there to help during idle and steady highway cruise.

it will have no effect on wide open throttle, it's inoperative then.

so use it, i'm betting it will help your idle out. if you have a really big cam and low vacuum they dont help so much however. they get weak with low vacuum so never actuate.

do you have a vacuum gauge? can you borrow one?