Think This Is Gonna Be A Issue? Rear Brake Line For 4.5" Lift?

One of the options I saw poking around on the internet for a factory style but longer rear hose for a 73 was the Raybestos BH36537 In place of the factory 1973 rear brake rubber house. I need something longer than stock since I have about 4.5" of total lift with the 76 suspension I put on the 73..... the Raybestos BH36537 is a ford f250 spec hose and it is the perfect length for the lift on the 73 I have.

I ending up getting it but I just noticed it uses 3/8-24 thread on all three connections.

The factory rear line at least on my 1973 is 7/16 fine thread.

I thought about using a adapter to use it but It looks like the actual fluid hole through the Raybestos BH36537 is smaller than my factory unit....


I wonder if I decide to use it with a adapter from 7/16 to 3/8's would the line pressure decrease and the rear brakes suck? I am using a ebay power booster and corvette master cylinder with a drum and disc proportioning valve if that add's anything to the equation.


Or does anyone know of a rubber hose that will take the place of the factory 73 line but be longer to work with the lift. I really don't want to use a braided hose..... I like using parts I can easily get at a parts house if needed..

I'm not well versed on fluid dynamics... But I know enough to ask questions when I am in over my head on the subject..

 

I don’t think they will make a difference.

 

The size of the orifice will reduce flow, but not the ultimate (static) pressure. Two different animals!

In theory this means the application of the brake might be slightly slower - but I doubt if it would be perceptible in real life.

 

The rear drum wheel cylinders see very little actual fluid flow.

 

Sweet. Thanks all.

I'll change it out tonight with a adapter and keep going with the project.