new GM steering box

This older post should give you some direction:

After a large amount of research, I believe such a box dosen't really exist in OEM form.
Every OEM quick-ratio application I have looked up so far has a different frame mounting pattern, or lacks enough internal travel.

Here are the five important differences between car Saginaw 800/700 boxes.

1. Later boxes omitted the upper rear mounting ear. That ear is need on an AMX. Make sure the box you choose is a 4 ear box.

2. There are many applications (most notably f-body and g-body) that have a narrower turning radius than what is required for an AMC. You need a box that has at least and 87° full sweep.

3. Later boxes switched to a 3/4 input splined shaft vs. the original 13/16. This one isn't a big deal, one can just bolt on a different rag-joint.

4. later boxes used o-ring fittings vs. inverted flare. This is another easy one, just use the easily available fitting adapters.

5. Some GM police/taxi applications had a slightly different pitman arm splines.

However, there are several aftermarket companies that will assemble the correct four mounting ear case with quick-ratio internals. This way you can have the steering box you want without modifying the car or losing steering travel.

If you can find one, the aftermarket Delphi 600/670 boxes have far better steering feel than is possible from a Saginaw 800 or 700 box. The downside to these, is while they fit with only minor almost non-issues (require different rag-joint and O-ring fitting adapters), they do not appear OEM.

akimmet wrote: 73Gremlin401 wrote: Ralph G. wrote: I'm thinking of replacing the power steering box in my '68 AMX with a later quick-ratio Saginaw box. What year/model GM car used the box I want? Is there any box that is a direct bolt-in with no issues with the steering shaft or Pitman arm splines or the hose fittings? Thanks! You specifically do NOT want to use a box from a GM car.  Although AMC used Saginaw to provide the steering boxes, the AMC spec boxes are different internally in 1 very important way.   The AMC spec boxes do not have internal stops, because AMC uses external stops to limit turning radius - the end of the strut rods where they attach to the lower control arms provide the stop. If you use a GM spec box, you will wind up with a humongous turning circle, making the car a PITA to drive around town and park. What you can do (and what I've done several times) is take your original box, and send it off to a rebuilder to have a quicker ratio installed, and not lose the turning circle you have now.   I use redheadsteeringgears.com - but there are others out there as well.  Turn-around is 2 weeks or less. This is not entirely correct, ALL Saginaw boxes have internal stops. The difference is whether or not the box is set-up with a wide enough sweep. AMC used 87° full sweep, while some GM applications use as little as 67°. Some GM car boxes actually are compatible with AMC bodies, most notably 65-70 GM A-body.

I know that the early Pontiac Trans Am quick ratio box cuts down the sweep. I found that out about 35 years ago.

Thanks to everyone who replied. Looks like a rebuilt original box may be m y best bet.

Go to Rockauto.com do a search for Steering-Box and type-in your make, model, year, and engine type and various types of Lares Steering-Boxes will come up!