It’s idling way too low. Should be around 1200 when it’s at operating temp.
I doubt it will have over 10” of vacuum....... but I do agree it should have a very short ignition curve with as much initial timing as it will tolerate without causing a hot start problem.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads