The cheapest fix is the Truck 833OD , the 34 shfit lever is reversed & points down this puts 3rd / OD in the 4th position , there is a bit of fiddling to use the best lever & you need to bend the 3-4 shift rod or use the ends off the truck rods & weld a new rod so it will not interfere with the crossmember , you also need to trim the front brg retainer down to 4.80 to fit into the belhousing & drill / tap the rear mount holes on the tail housing to mount the shifter , other wise it is a bolt in & uses the same 23 spline clutch , belhousing , mount , driveshaft , shifter & shift rods other than the 3-4 .
Next best is the gear vendors conversion which bolts onto & replaces the tailhousing but it is not cheap either .