I have a 3/4 ton 65 Chevrolet truck. I'd like to put better gears in for a higher highway speed, and I'd like to use 6 lug wheels. Unfortunately, it doesn't have a Dana, because there are gears available for those differentials.

Basically, I'm thinking about turning it into a 1/2 ton.

Have any of you ever done this? If I put in a 12 bolt, is the driveshaft the same?

Is there any way to put just 1/2 ton spindles on 3/4 ton A-arms?

Any thoughts in general on making the 3/4 more driveable?