I just bought a 1963 C30 (numbers matching straight 6 and 4 on the floor). I was looking for advice on how to make it a better DD. I want to keep it as original as possible but I'm not against modernizing the engine, I just don't know how...

So here's what I'm looking for:
- engine reliability
- tires/wheels (I've got split rims up front that I'm not to fond of working on)
- transmission
- gearing


1963 C30 Flatbed
1984 CUCV