[oletrucks] Clutch servo cylinder

[BagpiperEd@aol.com]

Would any of you guys have knowledge of, or access to the fitting size for  a 
mid-80s full size Blazer hydraulic clutch servo supply line?  The master  
cylinder end is a 3/8-24, but I can't figure what the servo fitting is.....I  
think it must be metric.
Thanks,
Ed.