What Pitman Arm? S10 manual box in 2nd Gen Camaro
 

I'm looking for a part number or application info for a pitman arm that allows me to use a S10 manual steering box in a 1971 Camaro Stocker. The shaft is larger on the Camaro power steering box than the S10 box, so I can't just swap that arm over, and the S10 box has no arm on it so I don't know if a factory S10 one would work. I'd prefer to use the good S10 box that I have rather than buying a new Flaming River etc. box, so hopefully someone here on ClassRacer can help out. Thanks in advance!

Re: What Pitman Arm? S10 manual box in 2nd Gen Camaro
 

Jeff... What is the Centre-Centre measurement of your Idler Arm? Also what is the Spline diameter of the S10 Box that you have? and Sector Shaft Diameter? Maurice.

Re: What Pitman Arm? S10 manual box in 2nd Gen Camaro
 

Hi Maurice, the center to center length of the pitman arm off the original PS box is 6 3/4" and it is straight with no offset. It has a tapered hole (0.545-0.625") for connection to a ball joint on the centerlink. Part number on the original PS arm is 3964881 for reference, but as I originally noted the shaft diameter on this box is bigger than the S10 box so it is not interchangable.

I just noticed that you asked the length of the idler arm and not the pitman, I will check that tomorrow.

The sector shaft is 1 1/8" at the seal and the OD at the splines is 1.110", with the threaded end of the shaft 7/8" diameter.

Re: What Pitman Arm? S10 manual box in 2nd Gen Camaro
 

you need a 4 bolt cover S-10 85-93 manual steering box and the 71 Camaro power steering pitman arm not sure but 3 bolt cover is supposedly different--FED 387

Re: What Pitman Arm? S10 manual box in 2nd Gen Camaro
 

FED 387, the one I have is the 3 bolt cover version and the spline is too small to use the Camaro PS arm. Is it worth going any further with it or do I need to find a 4 bolt one or go aftermarket?

Maurice, the idler arm is 6" center to center.

Re: What Pitman Arm? S10 manual box in 2nd Gen Camaro
 

You need a box with the 4 bolt cover. 3 bolt cover fits early Camaro.

Re: What Pitman Arm? S10 manual box in 2nd Gen Camaro
 

Thanks everyone for the feedback, much appreciated!

Re: What Pitman Arm? S10 manual box in 2nd Gen Camaro
 

I guess I'm late to the party but on my 3rd gen Camaro I used my Camaro pitman arm on my S10 box.