Idle drop by 500 rpm?

If it only started doing this since u cracked the secondaries open wouldn’t it stand to reason to close them back up? And if ur pulling vacuum where it shouldn’t be the carb surely needs a rebuild at least. May have worn throttle shafts also. It it was great with points try installing them again. Kim
It's 12 years old. Seen some dragging, and a few years of street use, daily, I'd hate to think i killed the Throttle shafts...what's odd is the Darn thing, after following RustyRatRod and Mattax instructions, to a t, she fired up and idled at 650, then dropped to 450 in gear.. then I tweaked the idle mix screws out, that raised the idle... checked w/ a light, timing was to advanced, so I retarded the timing. At some point, I gave it a little gas, and got a pop outta the primaries. SOB never idled since... Thanks Kim, hope all is well, Chuck