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Old 10-26-2009, 06:37 PM
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power steering question

I have a 57 chevy truck with a mustang ii front end and manual mustang ii rack. well its time to switch to power steering, question is sould i go with a mustand ii power rack or a t-bird power rack, which is better and why, also what pump should i use, i know theres a few choices, i have a sbc if that makes any differnce, thank you , mike

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Old 10-26-2009, 07:59 PM
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Quote:
Originally Posted by slammed 57
I have a 57 chevy truck with a mustang ii front end and manual mustang ii rack. well its time to switch to power steering, question is sould i go with a mustand ii power rack or a t-bird power rack, which is better and why, also what pump should i use, i know theres a few choices, i have a sbc if that makes any differnce, thank you , mike
Unless you want to refab your mounting brackets, stick with the MII rack. IIRC, the T-Bird's bolt spacing is different...

Russ
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Old 10-27-2009, 04:22 PM
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power steering

RE: Gm power steering pump with a mustang rack................

I dont have the specs handy, but from memory, GM pumps can put out 1300+ psi, and mustang racks only take about 750. There are kits from borgeson, or separate reducing valves you can use to match them up.

Disclaimer. Old guys suffer from CRS (can't remember sh...) so the specs could be wrong, but you definetly need to check it out.
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Old 10-28-2009, 08:34 AM
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Hmmm ...
Some (late 70's, early 80's?) Fords were factory equipped with Saginaw power steering pumps (same as Chevy)

Also following the "CRS rule", though ... I can't recall if they used a Ford or a Saginaw power steering box.
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Old 10-28-2009, 01:35 PM
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I'd want to compare the racks for of shaft, tie rods and joints. etc size and therefore strength, as I suspect the beautiful and popular '57 Chevrolet truck weighs considerably more than a pi**- ant Mushtang II. Ooops, am I displaying a bias there?
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Old 10-28-2009, 03:09 PM
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As a bit of a follow-up to my last post:

78 Thunder-chicken with a 302 for an application.

PUMPS:
========

It appears that the Ford "C3" style

pump with the plastic reservoir was standard, and that the

Saginaw

pump was used in the "Extra Duty" application.

BOXES:
======

They list both Ford



and

Saginaw


power steering boxes for that 78 t-Bird application as well, which leads me to believe that the pump and gear need to match.

It has been suggested on other threads that perhaps different relief valves are available, as well as adapter fittings (from 45 SAE flare to Metric O-ring) are available through some of the custom hot-rod shops ... but I have never had anything to do with that situation.
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Old 12-02-2009, 04:42 PM
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there is a good thread on power racks here
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Old 12-02-2009, 05:43 PM
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Speedway has an off set bushing so the Tbird rack will fit the Mustang II mount.

You use Mustang II tie rod ends with the Tbird rack on a Mustang II suspension.

Mustang II tie rod ends are functionally the same size as GM tie rod ends.

Omni/Horizon used a Saginaw pump with a reduced pressure with their rack.

The Tbird rack is a bit slower that the Mustang II rack, so is less sensitive.

Mustang II ball joints are bigger than GM ball joints.
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