Many years ago I dug in & learned the zen of just how Quadrajets work and their common issues. I never considered jobbing out something that you could learn & do yourself. No dealing with getting screwed. No question about what was done & good insight to any remaining issue. It’s called a man...
Pulled & parked the plow off the K20. Officially called the season. Impressed w/ the way Rustoleum Massey Ferguson grey held up for the winter. Filled the temporary tank w/ 90 octane non ethanol & she seems to like it.
Pull all belts, alt, AC & try to duplicate. Shouldn’t have any heat shields that are notorious for rattle at specific rpms. Might have a partially collapsed muffler that would account for it.
Story today about a beloved 57 Belair stolen in Az.
They cased the owners routine, unlocked his gates & winched up on a roll back. Neighbor got the truck on camera. Nothing you can do if they are determined pros. Best is a cheap hidden phone that you or cops can locate.