All I can say is beware of AGR Performance stuff.
I installed their 12:1 Resto steering box (Summit p/n 492117) and "High Performance" power steering pump (Summit p/n AGR-806324).
After I got the car on the road the power steering pump started leaking and howling like a very unhappy cat.
I called Summit but it was past the 90 day warranty.
AGR said they'd rebuild it for around $100 including shipping with about 1 week turnaround.
Finally got it back a month later.
Damn thing had blasting media in it and a badly chewed up shaft.
Long story short, had to buy another pump from elsewhere.
Been fighting these idiots to get my rebuild money back for over three months.
Will be contacting Better Business Bureau, Summit, and possibly Texas AG.
If you go to BB site, they have a F rating, lots of complaints.
Supposedly they were the go-to-guys right before I did my car, then they were bought out and went downhill.