Hello:
I am working on a 69 Camaro and I'm in the process of upgrading to 4 wheel manual disc brakes (Baer SS system). From the factory, the car came with power front discs, drums in back. Can I use the an original-type distribution block (that mounts under the master cylinder) along with an adjustable proportioning valve for the rr brakes? I will NOT use any of the other factory valves (i.e. metering valve, hold-off valve). THANKS!

Yes you can! Exactly what I did.

yep, just make sure you put the prop valve after the dist block, not between the dist block and master cylinder. The latter would cause the brake warning light to come on whenever you got on the brakes hard. I need to redo mine one of these days to fix that... :)

That's just what I thought. I just needed some confirmation. Thanks!