i am currently restoring my 69 b body. I am reusing all my brake components. Lines, mc, wheel cylinders, front calipers. All components where only a couple years old. I drained all the lines, painted the calipers, mc and rear wheel cylinders. I tried to remove as much dot 3 fluid as possible. There might be very light amounts stuck in the wheel cylinders, maybe internal to the master and in the brake caliper cavity’s. I was thinking of switching to dot 5. In order to protect the paint. The car has manual brakes. Will this be ok to add dot 5 to this system? I have read they shouldn’t mix. I also replaced the proportioning valve from inline tube. I have read to not use dot 5 with there valves because of leaks?? Any recommendations?