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#1 |
Registered User
Join Date: Jan 2007
Location: Prunedale,California
Posts: 24
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sb drivers side alt bracket upper
does anyone know where i can get one of these brackets from ...i have the lower bracket which i repainted already but i need the upper bracket.When i ask around for and upper alt bracket (drivers side) on a sb chevy short waterpump i get the deer in the headlights look.or they point me at something that cost 400 bucks lol
i am getting ready to do the cs-130 alt conversion and i wanted to clean up this area to while i am at it. thanks
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'69cst/10 |
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#2 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: sb drivers side alt bracket upper
Your best bet will be to subscribe and post a WTB on the parts board.
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#3 |
Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: sb drivers side alt bracket upper
I have one you can have for free.
Dean
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1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. ![]() Last edited by Sport/Truck; 02-11-2007 at 12:30 PM. Reason: Typo |
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#4 |
River life......
Join Date: Oct 2005
Location: Soldotna AK
Posts: 1,078
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Re: sb drivers side alt bracket upper
Check your local parts store, autozone/advance, both of them have them usually. They are in there "chrome" parts section.
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#5 |
Registered User
Join Date: Apr 2006
Location: oklahoma
Posts: 10,670
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Re: sb drivers side alt bracket upper
There are 3 types of upper brackets for short water pump small blocks. The 67-68 type, the 69-71 type and the 72 type. I think the chrome one at the parts store is 67-68 type and the 69-71 is avaliable by some vendors. The 72 style was avaliable new awhile back but havent seen them avaliable lately. Hope this helps.
Last edited by Aarons72s; 02-11-2007 at 12:30 PM. |
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#6 | |
Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: sb drivers side alt bracket upper
Quote:
s/t
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1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. ![]() |
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#7 |
Registered User
Join Date: Apr 2006
Location: oklahoma
Posts: 10,670
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Re: sb drivers side alt bracket upper
The 67-68 is real long as it mounts to the water pump. The 69-72 mount to the alternator bracket on the head. The 69-71 is shorter than the 72 bracket. If the bracket came off your truck it was probably the 69-71 short bracket since yours is a 71. If I remeber right the brackets were lengthened in 72 for the larger diamater redesigned alternator housing that looks like the 73 up alternators but is still external regulated. Hope this helps.
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#8 |
Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: sb drivers side alt bracket upper
My brackets were all hosed up (see picture). I got a set from a guy in Texas and haven’t installed then yet, so I really don’t know if they are going to work. Here’s a picture of the old alt set up.
s/t
__________________
1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. ![]() Last edited by Sport/Truck; 10-04-2007 at 08:09 PM. |
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#9 | |
Account Suspended
Join Date: Mar 2003
Location: ** THE FALL GUY **CHICAGO IL
Posts: 5,883
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Re: sb drivers side alt bracket upper
Quote:
looks like yours are installed upside down on the incorrect side ![]() |
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#10 |
Who's got steelies?
![]() Join Date: Feb 2006
Location: Morrison, Oklahoma
Posts: 1,026
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Re: sb drivers side alt bracket upper
This post is great. There needs to be a FAQ thread showing what accessory brackets are correct for the different years.
Note that the 67-68 alternator setup uses a boss on the front end of the left exhaust manifold, 69 and later doesn't. What year did they switch to the pass. side alternator mount on the small blocks?
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#11 |
Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: sb drivers side alt bracket upper
Yes that's what was done. I got them all ready to go one now. The brackets look like the one your in your last picture.
__________________
1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. ![]() Last edited by Sport/Truck; 02-11-2007 at 09:16 PM. |
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#12 |
Registered User
Join Date: Apr 2006
Location: oklahoma
Posts: 10,670
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Re: sb drivers side alt bracket upper
That looks like a 69-71 upper bracket and modified for passenger side use instead of on the correct driver side. Not sure. Never seen one modified like that. Sorry not much help on this one.
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#13 |
Sierra Grande Club
Join Date: Jan 2007
Location: New Mexico USA
Posts: 2,433
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Re: sb drivers side alt bracket upper
Ok, that’s good. They really didn’t modify much, just jerry rig every thing up.
__________________
1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe. ![]() |
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#14 | |
Senior Member
![]() Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,873
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Re: sb drivers side alt bracket upper
Quote:
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. |
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#15 | |
Registered User
Join Date: Jan 2007
Location: Prunedale,California
Posts: 24
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Re: sb drivers side alt bracket upper
Quote:
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'69cst/10 |
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#16 |
Senior Member
Join Date: Apr 2005
Location: Joppa, Maryland
Posts: 4,408
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Re: sb drivers side alt bracket upper
Still available as of last summer at any GM dealer. Part #3951338
That number says upper alt bracket for 67/72
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1997 GMC Sierra Ext 1965 Mustang |
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#17 |
Account Suspended
Join Date: Mar 2003
Location: ** THE FALL GUY **CHICAGO IL
Posts: 5,883
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Re: sb drivers side alt bracket upper
heres a couple different alt brackets
![]() Last edited by rage'nrat638; 07-12-2007 at 06:57 AM. |
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#18 |
Too many projects
Join Date: Mar 2004
Location: Fargo, ND land of the flat hills
Posts: 1,147
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Re: sb drivers side alt bracket upper
Here's my 70 with the driver's side bracket. You can see the top in the pic. They do sell chrome ones at most parts stores that mimic ours.
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Andrew 84 GMC C1500 SWB 6.2 Diesel/700R4/3.42 "Grandpa's odd duck" |
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#19 |
Registered User
Join Date: Jan 2007
Location: Prunedale,California
Posts: 24
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Re: sb drivers side alt bracket upper
note the angle of the curve on rage'rat638's top 2 pics....that is the correct part,the aftermarket chrome ones i bought and tried had a milder curve and would bottom out on the cooling fan of the alt,so then i thought maybe i will run the tension bolt thru the backside of the alt mount but the bracket bottoms out on the body of the alt before the bolt will go in,yes i could change the belt to a shorter belt but would then be very close to covering the power steering pump.i gonna try to upload a couple of pics.
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'69cst/10 |
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#20 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: sb drivers side alt bracket upper
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__________________
"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#21 |
Account Suspended
Join Date: Mar 2003
Location: ** THE FALL GUY **CHICAGO IL
Posts: 5,883
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Re: sb drivers side alt bracket upper
heres one set for sale on the board
http://67-72chevytrucks.com/vboard/s...d.php?t=226313 ![]() lets see 2/11/07 2:21 pm how long will it last ![]() Last edited by rage'nrat638; 07-12-2007 at 06:57 AM. |
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#22 | |
Rolled on Paint Club
![]() Join Date: Jan 2006
Location: Windham, CT.
Posts: 232
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Re: sb drivers side alt bracket upper
Quote:
![]() Bob
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1970 GMC 1500 swb fleetside SB 355ci. Smog heads Summit 1102 cam Performer intake and carb. Finally in about 1 piece in the yard. |
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#23 |
Registered User
Join Date: Jan 2007
Location: Prunedale,California
Posts: 24
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Re: sb drivers side alt bracket upper
well... when i purchased the aftermarket chrome piece i noted it had 2 bolt holes for mounting it so i figured that one went on the lower bracket and the other went to the empty bolt hole located on the head...just made more sense to me for it to have 2 bolt holes.i took a few measure ments and made up some chrome spacers for the bolts and then i went to put it on and the angle was way to far up ward,i really wanted the 2 bolt holes so i wouldn't have to worry about the pivot point moving and....i wondered about the big wahooo bend on the peice i had,see i wanted the bracket to be straight because in my little mind i was thinking ok belt applies pressure to pulley ( if its tight) so i want to make the mount straight and durable,alt might be more stable with better support,because to me the stock bracket on a pivot point doesn't make alot of sense. anyway so the bolt holes didn't line up to well so i drilled them and i still didn't like the angle so i hacked the bracket shorter and removed one of the bolt holes ...then it bottomed out on the alt.
thing i s i can't beleive only certain models of trucks were afflicted with this bracket...has to be a fair amount of other gm products still on the road....someone has to have thought at some point maybe we can improve this,make it fuction better and make it look better .......with out costing 400 bucks doesn't have to be laser cut polished aluminum
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#24 |
Who's got steelies?
![]() Join Date: Feb 2006
Location: Morrison, Oklahoma
Posts: 1,026
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Re: sb drivers side alt bracket upper
OK, here are some pictures I took of some brackets I am cleaning up to repaint.
The first pic shows a 67-68 bracket on the left and I believe a 69-71 on the right. The second pic is just the sickle-shaped part to compare the shape. ![]() ![]()
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#25 |
Registered User
Join Date: May 2005
Location: Beaverton, OR
Posts: 3,728
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Re: sb drivers side alt bracket upper
I didn't like my alternator hanging that far out, so I used a Camaro mount for the passenger side. It's a lot closer to the engine and doesn't look as bad IMO.
My truck is far from "correct" though.
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New Project: 1966 LWB C20 Plans: 1/2 ton conversion Dropmember front Dropmember rear Corvette discs Restored raised bed http://67-72chevytrucks.com/vboard/s....php?p=4295210 |
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