Need help with front roters - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jim Osborne · 09-13-2010, 10:39 PM

I have a 68 stepside with a 86 Corvette IRS out back with disc brakes. My problem is I have 71 C-10 drop spindles in front . Are they a roter out there that will fit these spindles that has the small bolt pattern lugs to match the Vette IRS. Hope someone has ran into this before that can offer some advise

raycow · 09-15-2010, 03:32 PM

You might want to look at rotors for 69-70 Chevy full-size cars and 69-82 Corvettes. These two are similar but not identical. The Corvette parts will probably be easier to find because the Chevy discs were optional, not standard. However, the Corvette rotors come less hubs, so you will need the hubs too.

Ray

PanelDeland · 09-15-2010, 05:15 PM

Or just have a machine shop drill your rotors.They should be able to space the bolt pattern you want between what you have.Just make sure to keep the pads taken care of since a new rotor will mean machine work again.

Jim Osborne · 09-15-2010, 10:47 PM

raycow;I thank those year full size chevys have the same lug pattern as the 71&up trucks.

OARNGESI · 09-15-2010, 10:52 PM

Pol sells rotors for a 71 chevy 1.25inch rotor with a 4.75 pattern like the vette just watch the hub bore when you buy rims

Jim Osborne · 09-15-2010, 10:59 PM

PanelDeland;I have considered redrilling my org. roters but was hoping I could fined one that would fit right over my spindles. But thers a lot of facters diameter,bearing size,redrilling may be my only option, thanks for your input.

Jim Osborne · 09-15-2010, 11:09 PM

OARNGESI; Iam not familar with Pol

cstm68 · 09-16-2010, 01:01 AM

Quote:

Originally Posted by Jim Osborne

OARNGESI; Iam not familar with Pol

pol= performance online www.performanceonline.com

raycow · 09-16-2010, 01:10 AM

Quote:

Originally Posted by Jim Osborne

raycow;I thank those year full size chevys have the same lug pattern as the 71&up trucks.

No, Chevy didn't go to 5 on 5" until 71. All other GM full size had 5 on 5" at least back to the 1930s.

69-70 full size are the only 4-3/4" rotors (besides C-3 Corvettes) that take the same bearings as the trucks.

Ray

ChevLoRay · 09-16-2010, 01:06 PM

GM has had the 5 on 5 pattern, as raycow stated. It used to be Cadillac, Olds, Buick and Pontiac had it, and Chevy didn't. I have a pair of old adapters that let you run a 4 3/4 on a 5 on 5 hub, or vice-versa, so you didn't have to run two spares. These are old.....like back in the late 5o's or early 60's. Back then, running an Olds rear end in your '55 Chevy race car was not unusual. I don't think these adapters would have you wanting to run them on the rear end, but who am I to say how they were used?

When the Chevies came out with disc brakes on the '71 trucks, I'm sure some bean counter at GM said to cut parts inventory and share some of the stuff across the parts lines. As to how many of those parts are shared....I don't know.

Re-drilling makes sense, but it isn't what I like to do unless I'm real good friends with the machinist.

1-PU70 · 09-16-2010, 02:06 PM

I dont know if you still can but if you go to the AC Delco web site with a part # it would give you a list of everything it fit.

09-13-2010, 10:39 PM	#1
Jim Osborne Registered User Join Date: Feb 2009 Location: Crumpler, North Carolina Posts: 93	Need help with front roters I have a 68 stepside with a 86 Corvette IRS out back with disc brakes. My problem is I have 71 C-10 drop spindles in front . Are they a roter out there that will fit these spindles that has the small bolt pattern lugs to match the Vette IRS. Hope someone has ran into this before that can offer some advise

09-15-2010, 03:32 PM	#2
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: Need help with front roters You might want to look at rotors for 69-70 Chevy full-size cars and 69-82 Corvettes. These two are similar but not identical. The Corvette parts will probably be easier to find because the Chevy discs were optional, not standard. However, the Corvette rotors come less hubs, so you will need the hubs too. Ray

09-15-2010, 05:15 PM	#3
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: Need help with front roters Or just have a machine shop drill your rotors.They should be able to space the bolt pattern you want between what you have.Just make sure to keep the pads taken care of since a new rotor will mean machine work again. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

09-15-2010, 10:47 PM	#4
Jim Osborne Registered User Join Date: Feb 2009 Location: Crumpler, North Carolina Posts: 93	Re: Need help with front roters raycow;I thank those year full size chevys have the same lug pattern as the 71&up trucks.

09-15-2010, 10:52 PM	#5
OARNGESI Registered User Join Date: Sep 2008 Location: CASA GRANDE AZ Posts: 4,276	Re: Need help with front roters Pol sells rotors for a 71 chevy 1.25inch rotor with a 4.75 pattern like the vette just watch the hub bore when you buy rims __________________ 70 SWB STEPSIDE 70 BLAZER 09 challenger

09-15-2010, 10:59 PM	#6
Jim Osborne Registered User Join Date: Feb 2009 Location: Crumpler, North Carolina Posts: 93	Re: Need help with front roters PanelDeland;I have considered redrilling my org. roters but was hoping I could fined one that would fit right over my spindles. But thers a lot of facters diameter,bearing size,redrilling may be my only option, thanks for your input.

09-15-2010, 11:09 PM	#7
Jim Osborne Registered User Join Date: Feb 2009 Location: Crumpler, North Carolina Posts: 93	Re: Need help with front roters OARNGESI; Iam not familar with Pol

09-16-2010, 01:06 PM	#10
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: Need help with front roters GM has had the 5 on 5 pattern, as raycow stated. It used to be Cadillac, Olds, Buick and Pontiac had it, and Chevy didn't. I have a pair of old adapters that let you run a 4 3/4 on a 5 on 5 hub, or vice-versa, so you didn't have to run two spares. These are old.....like back in the late 5o's or early 60's. Back then, running an Olds rear end in your '55 Chevy race car was not unusual. I don't think these adapters would have you wanting to run them on the rear end, but who am I to say how they were used? When the Chevies came out with disc brakes on the '71 trucks, I'm sure some bean counter at GM said to cut parts inventory and share some of the stuff across the parts lines. As to how many of those parts are shared....I don't know. Re-drilling makes sense, but it isn't what I like to do unless I'm real good friends with the machinist. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

09-16-2010, 02:06 PM	#11
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	Re: Need help with front roters I dont know if you still can but if you go to the AC Delco web site with a part # it would give you a list of everything it fit. __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters



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