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#1 |
Registered User
![]() Join Date: Dec 2012
Location: Chandler AZ
Posts: 1,149
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Disc conversion issues
I have received a disc brake conversion kit for my Longhorn. Upon inspection I see the lugs on the discs are much larger diameter. Are 72's 9/16"? I have a line kit, dist valve kit and new master cylinder/booster on the way too.
I can hardly wait for more issues to arise. Anything I should look out for?
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1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 |
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#2 |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: Disc conversion issues
Yes, 71s and 72s were 9/16". Earlier w/drums were 1/2".
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#3 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Disc conversion issues
Yep. I did this on my '70 and wound up replacing all the studs up front with the 9/16" that they came with (off a 72) and converting my rear Dana60 to 9/16 also, which started life as 1/2" studs.
I suppose you could run mismatched studs (9/16 up front and 1/2 in the rear), but I wanted to get them all the same size.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#4 |
Hybrid67
Join Date: Jan 2009
Location: Martinez, GA
Posts: 195
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Re: Disc conversion issues
good info. Prob going to order the same set for my 67 sometime next year
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#5 |
Registered User
![]() Join Date: Dec 2012
Location: Chandler AZ
Posts: 1,149
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Re: Disc conversion issues
Thanks davepl. Was the rear stud change difficult? Or was it pound the 1/2"s out and press in 9/16"s in the drums? Heck maybe I'll do a rear disc too. They are about $500 from BlackBird.
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1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 |
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