How can I tell what model tranny is in my truck?

[yunit]

I have a 78 k5, that is stick, but i do not know how to tell what it is. Does anyone have diagrams of different transmissions I can look at? Thanks, Pete.

 

[Chris Demartini]

<font color=blue>More than likely, its an SM465. I have that trans</font color=blue>

http://www.chrisd71k5.coloradok5.com <font color=blue></font color=blue>

 

['73 K5]

If its a 4speed with a double low first gear, thats it.

'73 K5
Chevy good...Ford bad