| |
Click on image for the lowdown. 
====
| | |
2 members (Eileen, 1 invisible),
80
guests, and
3
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,079 Posts1,056,310 Members48,442 | | 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: Mar 2006 Posts: 319 Shop Shark | | Shop Shark Joined: Mar 2006 Posts: 319 | 6K116565
6 = 1966 model year
K = assembly plant
116565 = production number
M20 has 2 grooves or rings on the 10 spline input shaft.
M21 has 1 groove or ring on the 10 spline input shaft.
"Nothing astonishes men so much as common sense and plain dealing." - Ralph Waldo Emerson
| | |
|
|
| |
