Re: Hydroboost Mounting Plates
Comparing the numbers, I would say it is a '77-'82 Vette master. The A1 Cardone part number is #101423 for the '67-'76 unit, and #101749 for the '77-'82 unit. A brand new '77-'82 unit is #131749. I don't know what the difference is between the 2 year groups. They both show to have a 1.125" bore.
I do believe the 2 fitting sizes are 1/2" and 9/16"
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