First I did a search and didn't get the answers I was looking for.
I know that the proportionate valve is devided so 1 front and one back is on each line comming off the master cylinder. So I'm looking for a way around buying a second solenoid. Now my question is could I tee the two rear brake lines comming off the proportionate valve, then run it into the solenoid, then tee back into two lines again? I have a paint picture showing what I mean, looks kinda crappy but meh it's paint.



Let me know if you've tried this or seen this done before or if it will work, and if it will still be ok for a street car, I want to still have functionable brakes. I want to do it this way for staging at the drag races to build boost.
And for the ending, would braided stainless with teflon lining be better to use than the rubber lining or vise versa?

 

Linking the rear brakes lines would be a bad idea for safety reasons. The system is designed so that if one channel fails, you still have an operational front brake.

On a more fundamental note, why do you need a line lock when you have an emergency brake?