318 Idle issues

I pulled two plugs tonight to do a compression test. Both plugs looked extremely clean. Light brown I'd say. I got tired at the end of the night but number 1 and 2 are at 145 psi. I will do the rest this weekend.

I don't know what IFR and IAB is.

Thanks.
Idle fuel restrictors and Idle air bleeds. Neither of which is adjustable on that carburetor I don't THINK.