Trying to finish off a manual brake swap. Im down to a few fittings and line size questions from keeping me from being done. Anyone who truly understands braking basics and what is on these cars im sure can help.

Why is the line running to my rear drums 1/4 while everything else is 3/16?

Does the factory use 3/16 line to the combination valve from the mc for the rear brakes?

I cannot find a fitting that will adapt the 1/4 to the mc...

Im using a mopar style manual mc.

Could you mount a line lock in between the mc and the combination valve for the fronts?

As of right now i have ditched the comb valve but if its needed ill replace it.

Thanks for any help

 

If anyone has pictures of their manual brake swap showing the fittings lines and prop valve that might help