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Forum members I am in need of someone who knows the routing of the brake lines from the passenger side of a 1966 gto convertable to the master cylinder. I am still running drum brakes for now with hopefully a front disc conversion down the road, was hoping not to spend the money at this point. Anyway, here is where I need help, I know how the original lines went as I took them out. I've tried to do this change over the correct way or at least what I've been advised. I ordered a brake booster and master cylinder from Ames performance, when it arrived I noticed that it was from the right stuff company. I've been told there needs to be a proportioning valve with the kit and that doesn't match the factory lines, here is where my problem began. I've had several guys tell me that I didn't need the value just make a line from the factory block for the front lines, cap the extra hole and then make another line from the rear brake line connect both to the dual master cylinder and your done...but a local mechanic and the tech from the right stuff company told me I need the valve. So back to my problem, I ordered new lines from the right stuff, how does it route to the master cylinder, can it be done with the motor still in the car? Right now I feel like I'm throwing money at this thing and hoping it works out! Please help if you can.
 

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if your here in the states call me

I will help you out

2 zero 6 465 9165

Scott
b4 10 pm pacific time
Im in the shop tonite mariners game might be turned up so leave a message if you call I will here my phone honk
and ring you back

easier 4 me and you to chat I hate typingggg
 

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Short answer is no, as long as you keep 4 wheel drum, you do not need a proportioning valve.

If you have a dual master cylinder and are running disks/ drum you will need a proportioning valve for the difference in pressure required to operate the drum vs disk system. So this is something you will need to get if you do that conversion in the front. That being said... a proportioning valve is not a bad idea to ensure the rear brakes engage first during a hard stop to keep the car going straight down the road as you slow down.
 
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