Fired it up yesterday in an attempt to fine tune the fuel screws and max the idle vacuum. Notice the linkage was binding and restricting low speed idle adjustment range (950 rpm and lower), resolved that by bending the throttle rod, then checked the range on each fuel screw and balanced, rechecked range, but it just isn't acting right. Vague input response may best describe it. Based on pressure readings when I started this mess it was a consistent 5 psi while idling, yesterday it was showing 3.5 psi at 1K rpm so the old Holley pump may be failing......epic timing.
Ordered a new fuel pump last night to eliminate pressure concerns. Holley mechanical that (per Holley) doesn't require a regulator and delivers 6.5-8 psi max and 110 gph.