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Old 12-10-2011, 10:56 AM
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Must II manual to power rack conversion

I have a Must II manual rack on my streetrod and want to change to power . I've seen a bunch of posts on this but nothing very recent and thought I'd see what the latest is . My original manual rack mounts are 16 " c to c on my 1978 pinto crossmember . I have seen offset mounts and all kinds of things to mount a power rack with 15 1/2 " centers to a manual crossmember . Is there a power rack available that has the 16" mount centers ? Maybe one readily available and cheap ? Not like $700 that flaming river wants ? Also need to know what pump is best to use on a small block chevy that would have the correct flow for the rack . I would like to hear from the guys that have already gone down this road . Thanks !

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Old 12-10-2011, 01:40 PM
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I have never used a manual rack. I have the impression a notch is required in the cross member to accept the larger steering shaft housing that is on the power rack. I thought the mounting holes were the same. Regardless, the GM pump will work on the power rack with the use of the proper mix of GM and Ford fittings. The GM pump produces more pressure than the 'Ford pump, but it will work with a bit more noise. There are kits available to lower the pressure to Ford level but I have noticed no difference in doing this. The rack may be more prone to leaking as it ages so if you are going to use the GM pump, you probably would be better off in the long run to install the kit.

Trees
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Old 12-10-2011, 05:14 PM
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You can use an 80s Tbird rack with offset bushings. You can pick one up in a salvage yard for $50 or so. Remans are about $150. These use a higher pressure stock than the Mustang/Pinto rack and work good with a Chevy pump. If you want lower pressure, use a pump from a Mopar from the 80s with a rack and pinion stock. It's a GM pump set up for lower pressure. You may have to notch the crossmember for rack housing clearance depending on which crossmember you are using. You will also have to change the lower Ujoint to 3/4 36 spline.
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Old 12-10-2011, 05:22 PM
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Mid 80,s T-Bird rack and offset bushings . So it will work well with a GM pump. That's good to know . That answers it . Thanks !
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Old 12-10-2011, 07:37 PM
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Napa carries rebuilt in the year you need. C-C should be what you want or they also carry offset bushings.
If you have already put in the steering it will have to be =changed. The power stub is shorter.
You can get a shim kit to change the pressure from the GM pump or just use the ford pump. A hose kit is also avaible that works with the gm pump. May need a different pressure fitting as the newer pumps are different.
Summit or speedway has all you need if you want new stuff. g
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