Hey Phil, welcome to the forum! On the main page of the forum there is a sub-forum called "FAQ Submissions". This is full of tons of information regarding projects like ... lowering, various hacks/tricks/mods/upgrades and whatnot.
Most of the well-known vendors that support this forum will be happy to help you with purchasing the correct kits to lower your truck or do any other project - give them a call - a full list is here:
http://67-72chevytrucks.com/links/browselinks.php?c=2
A lot of the guys I see that want a simple bolt-in quality kit and will pay a few extra bucks for good service, quality parts and simple install without a lot of hcking are using ECE's (early classic enterprises) lowering kits.
If you want extreme lowering and adjustability, there is a great FAQ post on "bagging for dummies" in the FAQ Submission forum.
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If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (
link)
I can't check the forum daily. If I don't reply to you within 24 hours,
drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.