I have a 65 lark. basic right! but i want posi...are there any easy swaps from anonther year GM that will work for me? or would i be better off just buying parts and convert it myself?o No:
all the worthwhile affordable swaps involve using later rear ends that are about 1 1/2 inch wider and require driveshaft mods. depending on what your plans are for an engine it may be worthwhile to buy an Eaton posi and a set of richmond gears for your housing and get new rear wheel bearings.
