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MADMIKE · 09-19-2011, 01:29 AM

Things to keep in mind.
The '84 Suburban rotors use larger wheel studs, but the stock riveted '70s 16.5" wheels fits. The '70 16.5" wheels clear the '84 rotors/calipers too. No need to replace the rolling stock. Although considering the weight, it would be well worth it for braking, accelerating, and cruising purposes to replace them with lighter wheels.

FWIW, looking up some parts I found that the '68 models had 1" WC with the correct angle for the hard line, but you will still need the 2- 7/16-24 Female to 3/8"-24 Male adapters. These could then be used with the smaller 75mm calipers. Along with the 1-1/8" bore MC of the later trucks.

09-19-2011, 01:29 AM	#7
MADMIKE Registered User Join Date: May 2010 Location: C.V. CA Posts: 30	Re: 1970 GMC 2500 2WD 8 Lug disc brake conversion Things to keep in mind. The '84 Suburban rotors use larger wheel studs, but the stock riveted '70s 16.5" wheels fits. The '70 16.5" wheels clear the '84 rotors/calipers too. No need to replace the rolling stock. Although considering the weight, it would be well worth it for braking, accelerating, and cruising purposes to replace them with lighter wheels. FWIW, looking up some parts I found that the '68 models had 1" WC with the correct angle for the hard line, but you will still need the 2- 7/16-24 Female to 3/8"-24 Male adapters. These could then be used with the smaller 75mm calipers. Along with the 1-1/8" bore MC of the later trucks. __________________ -Michael