Got a 99 1500, what parts can i use on a 64?

[bigredcj]

I've come into a 99 silverado by way of my son wrecking his. He's fine but the truck is too far gone to fix. My question is this... what can i use from the 99 on my 64 swb? I know im gonna use the 5.3 and tranny. What about things like the rear end, gas tank, power window motors, power door locks, tilt column etc... Im sorting thru all the posts and builds on here, and Woogeroo sent me a great link to FAQs. Any ideas would be welcome!