Mopar Power Steering Pump Identification Help

[v8liveson]

Hi all- I have a couple of Mopar power steering pumps that I was hoping someone could help me identify. These came with a couple of parts lots and I'm not even sure where to begin with figuring out what they are for. (The pump mounted on the engine: the engine is a 1970 318, but I noticed the ps pump reservoir cap is plastic, which I assumed to be later than 1970). I'm somewhat new to Mopars and still learning these little nuances. Thanks in advance!

 

[v8liveson]

A couple more photos from the side

 

[Huskidrive]

They are all Saginaw pumps......

 

[v8liveson]

Any clues to tell what application they are for? Small/big block, A/E/B body, etc.?

 

[moparmarks]

Both have small block brackets and pulleys.
The one on the motor has the later reservoir and pulley. 73-up I think.
They are the same for A,B and E bodies.

 

[TomIGo]

Hey Moparmarks, Question for you to clarify for myself. The unit that is attached to the engine in the first pic above should use a different belt based on the pulley it has, correct? The belt that is hanging off the water pump doesn't appear to be correct for the PS pulley.

 

[Challenger RTA]

trw vs federal pump

 

[moparmarks]

There are 2 belts. The fan and alternator belt uses the inner crank groove. The P/S belt uses the outer crank groove by itself. Hard to tell but I think that is the wrong water pump pulley for this setup. Also this setup is for non-a/c.

 

[moparmarks]

The 2 pumps shown are Saginaws.

 

[340challconvert]

Pic of the PS pump set up on a 70 small block

 

[340challconvert]

And a pic with the factory ps cooler

 

[Challenger RTA]

Mounting bracket

 

[TomIGo]

It appears that the front-most bracket on the pump with the factory cooler is a bit different. I assume that is due to the different pump, might be a TRW based on the descriptions in the pics above from RTA (looks like it has a hex-shaped hole when I zoom in)? Thank you all for the close-up shots and the diagram! This helps a lot!