Quote:
Originally Posted by f66
1. The M/C has part number 618082 cast in the bottom and has a screw on cap. Is this potentially an original or replacement original?
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I have that exact same 618082 master cylinder on several low mile trucks. 8700 mile 65 K20 , 18,000 mile 66 GMC , my gold 66 K20 22,000 mile truck. Thats two Janesville and one Flint built trucks. I've found these same master cylinders NOS on 64-66 Bendix boosters. I believe that master of yours IS correct and original for your truck . Ive sent mine out to Lone Star Calipers to have stainless steal sleeves installed and restored.