MY71CHEVYTRUCK, it took me a while to figure out how to use the parts section and classifieds. So here is what I've learned, below. Welcome to the forum.
I think this is probably a better link for parts.
http://67-72chevytrucks.com/vboard//...isplay.php?f=8
Bookmark it. Once you are on that page, click Forum Tools and then Subscribe to this forum.
Then you can receive daily emails and keep an eye out for parts that you need. The email you receive each day will have clickable links to each ad that you like the title to. If you find an item you want to buy, reply to the ad and say "I'll take it". Don't be shy, others could reply faster than you and get the part if you hesitate. Then PM the person who put up the ad to arrange for shipping, payment, etc. You PM the person by clicking on their name and then click on Send private message to.
In the upper right corner of any forum page is a link that leads you to check your private messages.
There is also a different kind of subscribe, where you pay for a membership. That is what Grumpy old man means by "become a member." If you click Subscribe you can sign up for a $25 membership here and then you can post your own classified ads to get rid of extra parts you have laying around, and you can post "want to buy" ads in the classified section too. You can reply to ads and buy items without being a paying member, but to post new ads you need to be a paying member. If you're not a paying member and you post anywhere in the forum that you are looking for a specific item to buy, your post will be deleted. Paying members very often post that it is worth the $25.