81-87 manual window regulator

[thirsty]

Can someone tell me how to identify an 81-87 window regulator versus a 73-80 regulator?
I know the glass is thinner in the 81-87 but not sure that I can tell them apart by just looking at the regulator.

A long time ago I donated my manual regulators out of my 86 to someones build because I had electric regulators that I was using. Now I want to switch back to manual windows and have to look for some. I want to make sure I get the right ones.

Thanks everyone.

[chuck13]

i'm sure someone will correct me if i'm wrong but......

isn't the channel that the regulator runs in on the window itself?i'm
pretty sure it is.i don't think the regulator itself is different from 73-80
and 81 up.............

[Jason S]

'73 had smaller rollers.  74-87 have the same size rollers, but the shaft the handle attaches to is different length.  73-76 had the same handle shaft length.  77-87 was a longer handle shaft.

Here is a photo comparison of the 74-76 (74 K-10) on the right and the 77-87 on the left (83 C-10).
Handle shaft length:

Overall dimensions:

Here is a comparison on the window width (just FYI)

[thirsty]

Perfect Jason! I was hoping there would be a visual difference that I could use to determine what style the regulators came out of.
Thanks a lot.

[Jason S]

When doing a swap a few months ago, I thought I should take some photos just in case.  Glad I could help.

[Captkaos]

Can't add a thing to this other than awesome job getting them all together, can I use this in a Tech thread?

[Jason S]

Sure Capt. Use what you need.  I'll be happy if it helps someone to keep from having to retrace their steps.