JimL82 and others:

I finally decided to buy a "New" quick Ratio steering box (an AGR from Summit, should be here in a day or so), and now have a question...

I ordered the box that is a dirrect bolt-in for my 66 (same input and the flare fittings on the hoses...)...

Since this is a fresh box with the quick ratio, I was thinking of using the plunger/spring (inside the back of the PUMP) from a 1996 Caprice 9C1 car... I would use the orifice, but that is for the metric o-ring fitting, and I have flared...

Now for my question (finally):

Can I use the spring and plunger from the Caprice, but keep my output fitting for the flared hose? Is there a benefit?

I am assuming my plunger/spring are close to correct for 1966 (bought a rebuild pump 8-9 years ago).

Is it worth trying? Is it a No-No?

Thanks...

PS, I was going to rebuild the 1996 Caprice 9C1 quick-ratio box, but mine has a noticable "click"/slight bind, and I am taking a 300 mile trip soon... I know I will not have the other box rebuilt by then, plus the possibility that the Caprice box will need more work, and needing to find/buy another rag-joint, etc... So I decided to get the AGR setup...

I seem to remember they look the same (I just had the pump from a 1976 Corvette apart and the pump from a 1992 Caprice apart) and they looked the same, I would assume they are, but it is wise to double check this with Jim.

The flow control plunger controls the maximum pressure that the pump can produce. So using the Caprice plunger will probably give you about 1400 psi maximum pressure. The gear box and the pump were designed to take those kinds of pressures. However, I don't know about your pressure hose. If you are using original hoses, they may not like all that pressure.

I would suggest first trying the original flow control plunger. Position your car on dry pavement. Hold it from moving with your brake and now try to steer to full lock. If you can make full lock with the original plunger. You have enough pressure available. If you are unable to get to full lock, with the car stopped, then you should try the new plunger.

The fitting on the back of the pump controls the amount of oil flow that the pump puts out. I would say that you can try it. It most likely will work acceptably.