Re: using JY lines..... what newer model Mopars would I look for that would have compatible lines?

Failing that, that's a good idea using teflon on the back bleed line retainer. I'll also give that a shot, and use the thumb as a check valve.. I'm also watching the back reservoir level to make sure this replacement doesn't have the same issue as the old one - or I'll be back to square 1 again...

Oh and good point about the brick- I had almost forgotten about that.

David