| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,069 Posts1,055,890 Members48,428 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Dec 2006 Posts: 206 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 206 | for trucks up to 1 ton , 1971 or 1972 was the first year that an integral power box was on the outside rail. Prior to that from 60 to 69 or 70 it has a manual box with a power assist ram. Prior to 55.2 to 59 was inside the rail and 47.2 to 55.1 was on top of the rail | | |
|
|
| |
