Newbie here!

I recently purchased an old 1969 GMC with the idea that it would eventually get a DD vs. between the frame rails vs. the current little 292 gas motor.

It has a 4 speed, I think a SM465, that I am pretty sure would not survive a DD.

The front wheels are 10 lug but they only use 5 so I am guessing the front suspension would need beefed up too.

Any thoughts of which DD would be a good fit?

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Thanks again!