Name this 3 speed

[JR]

I pulled it out of the 69 D100 today (pulling a trans when you feel like **** with a cold sucks! ). It is a 3 speed, not that heavy and not the stock trans for the truck but it is going back in anyways for now.

What kind is it?

 

[daliant]

A903

 

[camd64]

looks like an A745 used in the trucks and more heavy duty setups. The bump near the front on the cover to clear the larger gearset.