YesAre your bleeders on the top of the calipers? If not, you will get air.
New rear cylinders installed 5-22. I am not having a problem with the rear, it is the front calipers that are getting full of air....In the mid-1970s, Chrysler eliminated the rear brake residual pressure valve from the master cylinder. Its function was to prevent any air from sneaking into the system via the rear wheel cylinder cups. In its place, Chrysler substituted “expanders” in the rear wheel cylinders. (Expanders are dish-shaped steel inserts that exert outward pressure on the cups.) If you should decide to use a master cylinder from a 1975-up car, be sure you have the expanders in your rear wheel cylinders. For at least 20 years they have been universal in all replacement wheel cylinders and rebuild kits.
Hmmm, specs say it for Corvette and Shivvy uses Delco-Moraine brake parts,,,,,,The speedway 1 1/8 looks like a gm unit and doesn't look to be available till October.Tuff Stuff 2071123 Master Cylinder Rebuild Kit, 1-1/8 Inch Bore