360 Questions.. pardon my ignorance.

RustyRatRod said
Gotchya. Just my personal advice, but I would disable and remove the OSAC valve.

Its gone, vacuum hooked direct from carb to distributor.

emmett442 said
Came here because I have pretty much the same truck, same setup. '74 D200 truck, 360, Holley 2210. My setup runs PERFECT, so I wanted to let you in on where I ended up with it, starting with square transfer slots:

10 degrees initial, limited to 33 all in
Ported vacuum advance
mix screws 2.25 turns out.

This equals a 700rpm idle.

For what it's worth.

Ok that sounds like I’m not far off. How did you limit the all in timing? What port on your 2210 is your advance hooked to? I feel if I bump up my base timing from 5 up to 10 I’d probably be in the vicinity of 650-700rpm for idle.