These trucks are some of the nicest ever made, enjoy it!
And luckily for us, there is a large enough demand to generate a unbelievable aftermarket scene... you can literally build a complete truck with aftermarket parts, cab and all...
All of the parts you will need can be found...
as an example, here is the complete lower door panel that can be replaced...
Classic Parts Link
Ive been working on my truck on/off for 8 years (and i'm only 25)
whenever im working on it though, I am having fun...
Enjoy it!