Hi all. I'm looking for opinions as I have options and I'm not sure which direction I really want to go yet.
Short background - '72 Chevelle, PO converted the front drums to front discs but didn't replace the distribution valve, and didn't add the front metering valve or rear proportioning valve, and didn't exactly use all the correct parts. Normally, not a huge deal, but . . .
I've determined the distribution valve is bad. I can only get a little pressure to the rear brakes no matter what I do, it constantly trips under severe pressure, and doesn't give enough pressure to activate the brakes. Before you ask - I've replaced the main line down the frame rail from the distribution block to the rear crossmember, the rear flex line from the crossmember to the axle, and the rear lines from the axle line to the wheel cylinders, as well as new wheel cylinders and all new rear brake hardware and shoes. Master cylinder is fine (on the 3rd one just in case, same issue.)
So, since I have front disc/rear drum, I figure I'll do it right. So, I have options:
1) Replace the distribution block on the frame rail with a proper combination valve, bracket, buy pre-bent front disc lines. Pros: retains brake warning light, just bolt in parts for the most part. Cons: Location is bad. It's down on the frame, right next to the header. Have to pull the header to swap it all out (no room to work.) Any future work is also quite difficult.
2) Replace the distribution block with a proper combination valve and bracket under the master cylinder. Buy new copper/nickel brake line kit, form up my own lines. Pros: retains brake warning light, easier working location, I get to buy a new tool
Cons: slightly more expensive, more time and work.
3) Replace the distribution block with a Wilwood adjustable proportioning valve and bracket under the master cylinder. Buy new copper/nickel brake line kit, form my own lines. Pros: easier working location, adjustable rear proportioning valve, and I still get to buy a new tool
Cons: lose brake warning light, much more expensive, more time and work.
4) (Not really an option) replace the distribution block on the frame rail with a new distribution block on the frame rail, add a front metering valve at the master cylinder, add a proportioning valve in the rear brake line. Pros: (none) Cons: lots of work, lots of parts, royal PITA. But, it is an option, but definitely not a good one.
So, thoughts/opinions? Note that looking stock is not a factor, so I'm open to anything.
Here are the various parts I'm looking at for the various options:
Copper/Nickel tubing kit:
Wilwood proportioning valve:
Wire-correct combination valve:
Proportioning valve bracket kit (side mount):
Front brake line kit:
Thanks for any opinions and/or other options/thoughts.