a 833 conversion

You can make an adapter to get the shifter in the A-body location on the truck transmission, then use A-body linkage. That would not be too costly, although you would still be left with a fairly wimpy transmission and you would have to get a shorter driveshaft. Changing the O/D to close-ratio would be pretty costly. Just sell the truck O/D 833 and find an A/F-body trans. They are not too hard to come by and prices can range anywhere from $200-$400 for the the bare trans.