I would feel confident in saying that few have as much hands-on experience with a Pro-1000 over the last 7-8 years as I have. (most don't have near as much patience hahaha
) I'm pretty familiar with them.
Everything from the rusty three upright poles and up is Pro-1000. The curved, dished out aluminum fixture tying those three together is a part I do not recognize and the accessory ram that links between the original press ram and the top end is also unfamilar and indeed, it's a "2001" Challenger press underneath. The entire top-end is also rotated clockwise nearly 45 degrees from typical.
I'd want to clean that up and ensure it is timed or will time properly. If you think you kind of like how it works and it seems like a setup you could learn to enjoy... I would recommend buying a -NEW- Pro-1000 while these relics are still being produced and offered for sale. A new one comes with a whole new set of dies in any caliber you choose and you can have it shipped to your door for under $200.
Full disclosure: my process and the one I am comfortable with does NOT allow for this press to handle my powder and for the most part, I also don't allow it to seat and crimp my bullets. This is my own hybrid system and I use a Pro-1000 as a high volume brass prep machine. Mine deprimes, resizes, primes and flares case mouths. For this job it works extremely well and the REAL reason I do it (obviously for the speed it allows me) is because I do well more than a dozen calibers on a shoestring budget.
I am familiar enough with a Pro-1000 to claim significantly over 100,000 rounds with one... and given this experience, I would personally NEVER recommend that someone use one to handle powder and bullet seating. Would it work, can it work? Sure it could. But this is no Dillon or Hornady progressive press here. It's not even close.
As a brass prep machine, mine is a MONSTER. I am currently lagging here in 2017 with only 3,800 loaded this year, but I am finding my groove again.