Bounder 1986 454 master brake cylinder
Another thought here. If you are on the road quite a bit I would recommend buying your part from one of the large chains (Advance,Autozone,Pepboys etc). It will be warranted and that way you can get coverage on the road away from home should the replacement part become defective. Also if you can get lifetime vs 1 year for a few bucks more that's the way to go. Master cylinders are usually re-manufactured so failure is a possibility. My two cents. Krazee