Best upgrades to 65 Factory 4x4 Burbs?

[sam512bb]

Good day All,

I have been a long time lurker and have been looking for a 4x4 Burb for a while now (3+ years). I am closing in buying a 65 Factory 4x4 Suburban and was curious if there is a consensus as to what would be the best bang for the buck upgrades to the old 4x4 running gear? That being said, what year and/model donor truck, jimmy, etc would be best for the updated parts?

Thanks in advance!

Cheers,

Sam