Welcome! Glad you joined.
Beautiful truck! I posted the pic so all could see w/o clicking on a link, which is really a scary thing to do in a newbie's post. But I chanced it, and the reason you couldn't post it is that it is too big. It is over 1Mb, but I just clicked the "Big" button in the Resize option column and there it is.
Where's home? I ask because we have a map (Bullnose Forum/Member's Map in the menu) and we could add you if we had a city/state or zip.
Popping through the carb, poor idle, and low MPG might be caused by a leaking accelerator pump in the Carter 1bbl carb. When they leak it allows extra fuel to go right into the intake and the rich mix those symptoms.
Gary, AKA "Gary fellow":
Profile
Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI