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Old 10-14-2007, 10:14 PM   #1
70 GMC Trucker
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Trying to Install Power Steering

I'm having some problems installing power steeing on my 70 GMC. It has a 350 with a long water pump but as you can see from the pictures the pulley on the pump would line up dead center of the two groove crank oulley. I haven't located the correct crank pulley as yet the line up doesn't seem right. The pump is from a70 Chev but my moter is a 73. Would it best to try and find a crank pulley,water pump pulley and power steering pump all from the same vehicle rather piecing it together. Thanks for any help !!
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Old 10-14-2007, 10:26 PM   #2
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Re: Trying to Install Power Steering

get a double belt pulley for the crank
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Old 10-14-2007, 10:59 PM   #3
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Re: Trying to Install Power Steering

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Old 10-14-2007, 11:04 PM   #4
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Re: Trying to Install Power Steering

If you can't find a 2-groove crank pulley that works, get the long waterpump (73+) bracket set for the steering pump. Everything will match then. It will mount the p.s. pump higher up on the block.
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Old 10-14-2007, 11:09 PM   #5
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Re: Trying to Install Power Steering

I know I need a double pulley on the crank but what I saying is the pump pulley would line up dead center of the two grooves on the crank pulley.
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Old 10-15-2007, 11:58 AM   #6
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Re: Trying to Install Power Steering

Don't think so. Look at what you have now the alternator lines up with the power steering pump. The new crank pulley would let alll three line up.
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Old 10-15-2007, 12:09 PM   #7
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Re: Trying to Install Power Steering

If someone has the measurements for the double or triple pulley I'll look in my goodie box - I have a ton of these and I'd get one out to 70 GMC gratis
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Old 10-15-2007, 01:29 PM   #8
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Re: Trying to Install Power Steering

You definitely need a double or tripple crank pulley to add Power steering but it still wont line up untill you have the PS pump that goes with the long water pump. 1st pic is an example of a motor I pulled where the guy has long pump with with same ps pump as you. he has triple pulley on the crank but still wont line up. second pic is motor in my truck with long pump w/correct ps pump for long water pump.
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Old 10-16-2007, 01:11 AM   #9
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Re: Trying to Install Power Steering

Thank you very much for the info, thought I had something wrong. Made a call and think I might have lined up the correct pump, any idea what years of trucks would work for this project. Thanks again
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Old 10-16-2007, 01:16 AM   #10
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Re: Trying to Install Power Steering

I'm running a PS pump from a 78 camaro, because, it mounts like the older "keyed" pumps, but uses the newer press on pulley.

think i got both the pump, and the OE pulley from autozone for under $40 total.

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Last edited by brak; 10-16-2007 at 01:19 AM.
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Old 10-16-2007, 06:54 AM   #11
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Re: Trying to Install Power Steering

ok from what i understand from seeing your pics is that your trying to run a saginaw power steering pump with a long water pump and passenger side alternator. The saginaw pumps were usually used with short water pumps and drivers side aternator with a different style pulley on the crank to match the short water pump, alternator, and power steering pump. The easiest way i could see to fix your problem is to go to the junkyard and find the other style pump(i believe its borg warner) that is made to work with your long water pump and it will line right up. Make sure to get the brackets with it also. Just my $.02
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