I agree with Otto, I recently replaced my original Delco made in the USA (embossed on the bore) master cylinder with an after market. I'm keeping the original for when I have nothing better to do but rebuild it. So it depends on what's important for you now. If you want it running asap, grab quick after market (my new one is Dynamic Friction also), if you have time and patience, rebuild it and keep it original. Just my 2 cents.
