[Learjockey1]

Sorry guys it is a series 74- ¾”.
Just talked to Bob at ERA ad he said they do not have “much of a problem” as in “no”. I asked if my frame number had issues and he said “no” again, so it must be a quirk. Bob said they have good luck so try another. Vettestr , your “thought line” was right on. That is why I mentioned the ERA 539 frame number. I am not bottoming out. I have assembled the tandem tube and all ERA parts and shims to spec with a “cross check” eye on alignment and straightness when under the car. I did engineer a rubber “stop” pad on the brake pedal lever to reduce pedal slop, but do not think it is preventing the pistons from returning/bottoming against the internal cylinder snap ring. I will take a second look, but the brakes are returning and the both front and rear brakes are not heating up. Thanks to all for the inputs. Vector 1, car has not set long enough for corrosion and I am using ATE Blue which is supposed to be one of the best fluids out there. About 6 months old now.
Barnsnake, I called CNC about their steel units but they do not have a top vertical port, only a rear horizontal port. I would have to weld a bung on the top behind the remote reservoir feed for my pressure line take off as the ERA uses the horizontal rear port for the brake switch. I can do this, but I figured I should not have to with the availability of current units.
Tilton said if I sent it to them they would look at it. Nice offer but does not cover damage and repair time.

Again, thanks to all