305 transmission

[GTS61]

Does anyone know how to tell what kind of transmission I have in my 1961 305 V6 three on the tree GMC stepside pickup? I'm new to this so any help would be appreciated. Thanks

[Andice]

Sm318?

[FetchMeAPepsi]

The 3 on the trees usually had a Muncie SM-318. That's what I have and I just rebuilt it in my build thread (see sig). Post some pics and we'll know for sure.