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#1 |
Registered User
Join Date: Jul 2012
Location: franklin.tn
Posts: 600
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short pump pulley question
I'm changing my 79 engine to be period correct 69 with a short water pump, ps/ ac/ what pulley part numbers do I need? I have all the correct brackets.
__________________ Or sale me a set. thanks
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#2 |
Registered User
Join Date: Jul 2012
Location: franklin.tn
Posts: 600
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Re: short pump pulley question
ok can anyone tell me if theses will work 3972180 c17,3927796ag ?
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#3 |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: short pump pulley question
Which style bracket is your A/C compressor mounted on? I see you read the thread from a couple years ago (http://67-72chevytrucks.com/vboard/s...d.php?t=472147) on this topic so you know why I'm asking. If It's like the one pictured below that is the original on my 69 3/4 ton with 350, I can check my pulley numbers and even post some pictures of the pulleys in a couple days.
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#4 |
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Join Date: Jul 2012
Location: franklin.tn
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Re: short pump pulley question
Mine is like this thanks......
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#5 |
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Location: Wisconsin & Arizona
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Re: short pump pulley question
That's the more common bracket set. I'll see if I have any pulleys that I can look at to get numbers. It'll be a couple days though. The mounting plate on your compressor looks rectangular. I've never seen that on these trucks. I've only seen square plates. Don't know it that matters other than belt length.
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#6 | |
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Join Date: Jul 2012
Location: franklin.tn
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Re: short pump pulley question
Quote:
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#7 |
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Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,509
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Re: short pump pulley question
You had better check your timing marks on the engine as the 79 engine I had in my 71 had the timing marks straight up at 12 O'clock and with a short pump I couldn't properly time the engine as you couldn't see the marks or get a probe on a scope into it.
That engine was a 350 out of a 79 ElCamino and an engine out of a regular truck may be different but it is something to consider and address while you are doing the swap over.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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#8 | |
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Join Date: Jul 2012
Location: franklin.tn
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Re: short pump pulley question
Quote:
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#9 | |||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: short pump pulley question
Quote:
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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#10 |
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Join Date: Jul 2012
Location: franklin.tn
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Re: short pump pulley question
19thanks for the info, and it was a good call, but I have the correct 1969 timing cover
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#11 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: short pump pulley question
True... but the timing mark on the 1979 balancer won't line up correctly to the 1969 timing tab.
Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
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#12 |
Registered User
Join Date: Jul 2012
Location: franklin.tn
Posts: 600
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Re: short pump pulley question
yes sir you are correct, thanks
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#13 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,940
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Re: short pump pulley question
10-4!
![]() Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
Quote:
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#14 |
Senior Member
![]() Join Date: Aug 2008
Location: Cedar Park, Texas
Posts: 7,500
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Re: short pump pulley question
Fyi the corresponding balancers should be used with swp or lwp. This helps avoid the timIng mark issue. You can run the smaller diameter balancer originally hinted for swap with a lap, but not vice versa. It won't clear.
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