Is this the correct power steering pump?

[DJ1967Dart]

Looking to replace my power steering pump on my 70 Challenger (383 with factory AC) - there are several pumps available at Classic Industries and I think? this is the right one?View attachment 75696

 

[Chryco Psycho]

3 pumps were available - TRW least likely , Federal most likely & the Saganaw which is the one pictured , only the saganaw had the oval neck , I assume you have the original pump , you need to match up the pump so that the brackets & pulley you have will work .
Do you have a picture of the original pump ?

 

[DJ1967Dart]

Yes - it's still on the car so here are a few pics. Been trying to line up like you stated but it's tight quarters in there...

 

[Chryco Psycho]

That would seem to be the correct pump given the oval filler neck .