Carter AVS 4611s too far gone ?

Doubtful, the amount of dissimilar metal corrosion present will mean the jets & rods are junk, & in no way will be what they 'were'.
I did a mid-'80's Q-Jet in a Dodge conversion van, 360 that actually had been running, the corrosion inside had actually removed the jet size stamping on one of the pri.'s.

Probably true, but I would have to check.