do you have the IACV mounted and hooked up? Do you have a restorbox wired up right? Is it fireing on all 4cly? I know nothing about your car (new or used parts). but if its running ruff check all that, then have it tuned.

Mine had a fucked up idle (not the up and down) just ran ruff. I hooked up
the IACV and adjusted the idle screw to my likeing (look up how todo that adjustment correct) and now im idleing at 900-1000 and runs top notch.