Power steering box differences

[truckeroy]

I am new to this site, but not new to old trucks. I have a 40 chev pu and a 64 chev pu and have owned a 50 and 46 chev pu in the past. I have ordered the kit from cpp to convert my 64 to power steering. It says to use a ps box from a truck up to 87. My question is can a box from a car such as a mid 70's camaro or fb be used instead? What is the difference? The spline? Thanks.

[truckeroy]

Guess I'll answer my own question. The camaro box is on the inside of the frame, the truck is on the outside. The other question is the instructions say use a box from 69-87 buy I thought that the input spline changed somewhere alone the line. Somewhere along 1976? Anyone know if it did? Thanks

[CPPAaron]

The steering gear mounting is all the same from 67-87 for this kit in a 800 series Truck box (passenger car wont fit)
The later 77-87 boxes are 3/4x30 spline and use Metric O-ring fittings were the pre-77 box uses 13/16x36 and inverted flare fittings.

[truckeroy]

The steering gear mounting is all the same from 67-87 for this kit in a 800 series Truck box (passenger car wont fit) The later 77-87 boxes are 3/4x30 spline and use Metric O-ring fittings were the pre-77 box uses 13/16x36 and inverted flare fittings.

Thanks for the reply. The instructions sent with the kit said a box from 69-87 would work, but the rag joint in the kit is only good for 67-76. This could cause an extra expense if the box on hand was the newer variety. This is what caused my confusion.

[raima55]

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