EMERGENCY INFO NEEDED - 3 speed manual from 67 Dart

I found a 3 speed manual from a 67 Dart /6 car for sale right near me for super cheap.

I am going to look at very soon (like, an hour). So I need some questions answered as fast as possible:

What would be the model number? (4 speed is A833, 3 speed is ???)

How much can they handle?

Mild 360 power possible?

I know some 383 cars had them back in the day, but I am not sure if thats the same tranny?

Worth my time? I want a manual but 4 speed prices are high and this is super cheap, if not I can use this in my other hot rod later on.

Thanks for your help in advance. I am going to start googling while I hear back from some of you, but google doesn't give testimonials.