Originally Posted by MiDiablo

If it were me, I'd check for vacuum leaks first, gasket leaks second, and IAC third.

I'd rule out each of those as possibilities, before making any changes/updates/upgrades.

Then when you've fully resolved the idle situation; revisit your same question... To carb, or not to carb...

Either way (carb of EFI), you can ditch the charcoal canister / smog pump gimmicks. And IIRC you can do an EGR delete for fairly inexpensive.