OK, I just talked to my NAPA guy about the 1.25" bore MC and this stuff is not as expensive as you're being told.

Part number M9220 is a new master cylinder that list for $319 and walk in customer pricing would be about $210.

Part number P9220 for a remanufactured master cylinder sells for ~$120 and the core charge is ~$20

Part number 33 is the rebuild kit for ~$25

As i may have mentioned earlier I just used the kit but the remanufactured cylinder seemed well priced if it was necessary. I'd also first look into having your own old cylinder sleeved (locally or elsewhere) with stainless steel and buy just the $25 kit. This might be less expensive than the remanufactured cylinder and will be the better longer lasting solution.

As for the modern dual circuit stuff sounds like you have good info and ideas on those options.

Grigg



1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-