I talked to Rich at Midwest Power Supply by phone this morning. This was much simpler than a trip to the Napa Auto store. I agree that he is good to talk to and is very knowledgeable. Better yet, he has the now out of production master cylinder used on my truck in stock (with correct brake and clutch bore sizes). Price was high compared to other units with different bore sizes that would fit the bolt pattern, but I decided to get the "stock" unit to avoid unknown (to me) effects on the clutch and hydrovac performance.
Since these parts seem to be going out of production, and I plan to keep the truck, I will look into rebuilding and keeping the cylinders I take off so that I, or a future owner/user, does not have to go through this or worse in the future.
Thank you to everyone for your answers to my parts problem. I could not have found this master cylinder without your help.
JRMunn
