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11-22-2009, 08:33 PM
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#1 |
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BLACK SATIN
 
Join Date: Jan 2009
Location: canton, IL
Posts: 266
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double pulley
I have a double crank pulley on my 67 250 ci w/manual steering. I was wondering if it is there for power steering? Thanks for any help.
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67 C10 Fleetside LWB-283, 3 on the tree,power assisted steering, father-in-law bought it new 67 C20 Fleetside LWB-'85 305 V8 (original was 250 6 cyl), Holley 600 carb, full length Hedman headers, dual exhaust behind the back wheels, 4 spd , manual steering 85 C10 Silverado- 305ci |
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11-22-2009, 08:49 PM
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Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: double pulley
Do you actually have a pulley ? Most inline engines just use a harmonic balancer with either one or two belt grooves.
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I'm on the Instagram- @Gearhead_Kevin |
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11-23-2009, 09:26 AM
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#3 |
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BLACK SATIN
Join Date: Jan 2009
Location: canton, IL
Posts: 266
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Re: double pulley
It's probably what you say, it has 2 grooves.
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67 C10 Fleetside LWB-283, 3 on the tree,power assisted steering, father-in-law bought it new 67 C20 Fleetside LWB-'85 305 V8 (original was 250 6 cyl), Holley 600 carb, full length Hedman headers, dual exhaust behind the back wheels, 4 spd , manual steering 85 C10 Silverado- 305ci |
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11-24-2009, 11:06 AM
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#4 |
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BLACK SATIN
Join Date: Jan 2009
Location: canton, IL
Posts: 266
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Re: double pulley
What is the 2nd groove used for? I'm looking into putting power steering on it & am trying to figure out what I need. I've looked at alot of pix of 250 cis on here & have seen some differences in the way they are mounted. Where is the pump supposed to be mounted? Also do I have to change my alternator pulley? Thanks for any help or pix.
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67 C10 Fleetside LWB-283, 3 on the tree,power assisted steering, father-in-law bought it new 67 C20 Fleetside LWB-'85 305 V8 (original was 250 6 cyl), Holley 600 carb, full length Hedman headers, dual exhaust behind the back wheels, 4 spd , manual steering 85 C10 Silverado- 305ci |
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11-24-2009, 02:10 PM
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#5 |
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BLACK SATIN
Join Date: Jan 2009
Location: canton, IL
Posts: 266
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Re: double pulley
ttt
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67 C10 Fleetside LWB-283, 3 on the tree,power assisted steering, father-in-law bought it new 67 C20 Fleetside LWB-'85 305 V8 (original was 250 6 cyl), Holley 600 carb, full length Hedman headers, dual exhaust behind the back wheels, 4 spd , manual steering 85 C10 Silverado- 305ci |
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11-24-2009, 02:57 PM
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#6 |
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Sisyphus was my mentor!
Join Date: Sep 2002
Location: Carleton Place, Ontario CANADA
Posts: 984
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Re: double pulley
Somewhere in the 70's Chevy increased the spacing between the grooves on the harmonic balancer/pulleys on the inline 6. I discovered this when I obtained my PS setup from a 79 passenger car. The space between the grooves on the balancer & the space between the grooves on the pulley are distinctly different. I still just installed it all & despite the slight misalignment, I still have yet to throw a belt. In hindsight, I should have gotten the the balancer from the donour.
However, if you can get a PS setup from a donour from a pre-wide spacing year vehicle, you are laughing. The pump bracket attaches to the head on the front & top, has a "leg" that runs down behind the alternator to the block, and the pump bracket also has a slot where the alternator bolts to for adjustment. You need not change the alternator pulley.
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passthebuck  #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car |
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11-24-2009, 03:23 PM
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#7 |
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BLACK SATIN
Join Date: Jan 2009
Location: canton, IL
Posts: 266
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Re: double pulley
That helps. Thanks alot for the info, PASS. Could I trouble you or someone else for a pic?
__________________
67 C10 Fleetside LWB-283, 3 on the tree,power assisted steering, father-in-law bought it new 67 C20 Fleetside LWB-'85 305 V8 (original was 250 6 cyl), Holley 600 carb, full length Hedman headers, dual exhaust behind the back wheels, 4 spd , manual steering 85 C10 Silverado- 305ci |
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11-24-2009, 03:38 PM
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#8 |
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Sisyphus was my mentor!
Join Date: Sep 2002
Location: Carleton Place, Ontario CANADA
Posts: 984
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Re: double pulley
Photos.
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passthebuck #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car |
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11-24-2009, 04:32 PM
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#9 |
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BLACK SATIN
Join Date: Jan 2009
Location: canton, IL
Posts: 266
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Re: double pulley
That's what I wanted to see. Thanks very much for the pix!
__________________
67 C10 Fleetside LWB-283, 3 on the tree,power assisted steering, father-in-law bought it new 67 C20 Fleetside LWB-'85 305 V8 (original was 250 6 cyl), Holley 600 carb, full length Hedman headers, dual exhaust behind the back wheels, 4 spd , manual steering 85 C10 Silverado- 305ci |
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