Sure, you know how to work on old trucks. Or maybe you're just starting in the hobby. Either way, safety is best learned through OPM (Other Peoples' Mistakes), not OJT!
Either as newly discovered wisdom, or a refresher, please read this article and live safely with your old truck!
Not sure how *speedy* your computer is, but the PDF view in the box, took a little while to pop up on my poky computer. And a few tries (trying to find out what the problem was). The link to the download works but that's a download.