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Installing hydroboost into my 88 question

svt dave

Member
I've read all the other hydroboost threads in this section but still am a bit unsure about this installation. I've got the hydroboost unit from an 03 cobra mounted in my 88 fox now I need to figure out the lines and pro portioning valve and I also want to include a line lock. The 2 lines coming out of the master cylinder are different sizes which makes impossible to connect to the original prop valve even if I change the fittings to standard thread. Or I can use the cobra prop valve but I dont thinks that would work with my original drum brake set up. What would be the easiest way to make this work?
Thanks for any advise
 

whiteponygt

Well-Known Member
A couple have used the newer proportion valve with the drum breaks you just have to get a valve to adjust the pressure front to back.
 

bigjohnsondohc

Active Member
not sure if you found an answer yet or if this helps but I gutted the stock porportioning valve and used a newer/adjustable one for the rear lines
 
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