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Old April 16th, 2017, 03:29 PM
wcstory wcstory is offline
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Join Date: Jan 2015
Location: Mashpee, Ma
Truck: 1966 2503
Age: 56
Posts: 65
Rep Power: 73
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Default Re: Question about switching to a Holley 500

I decided to read the documentation that came with the 4412 Holley

Holley 20-95 Throttle Cable Bracket

Holley 20-89 Return Springs


From the 60-66 GMC site

Mr. Gasket Adapter #720-1937.

XRP 700106 Size 6 to 7/8-20 Holley Carburetor Adapter

XRP 239006 Size 6 90 Degree Push-On Hose End

I think I may have the manifold machined flat and weld a Holley base plate onto it.
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