It looks like GM started with a typical '63 Chevy cab, and then changed it to accomodate the hydro clutch/brake master used on the '60-'62's. From what I have learned in the past several months, the '63 GMC's were like this. They had the hydraulic clutch system as the '60-'62's did. So yours is just typical of a '63 GMC.
Quote:
Originally Posted by creep
Something is screwy with my firewall. It looks like it was made for a single reservior master like a normal 63-66 but modified to accept the dual reservior for a hydraulic clutch like a 60-62.
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