Brekes Proportionate Valve

mcutlass1969 · February 1st, 2007, 06:08 AM

I am changing out the 350 for a 455 in my 69 cutlass. When installing the aftermarket Holley headers we had to move the brakes proportionate box to allow room for the header. Not sure why that had to be done. Figured the car was designed to handle the larger motor. Anyway I want to just reinstall this box on top of the frame rail laying flat vs. on its side. Does anyone forsee any concerns in doing this? Not sure of the inner workings of the box in which it has to be installed on it's side. Another thought is to move it down and back on the same frame rail.

Oldsguy · February 1st, 2007, 06:52 AM

Just be careful to avoid kinking or bending the lines. Otherwise, I don't see a problem.

texasred · February 1st, 2007, 07:30 AM

That's the way it's done, all right. On top of the frame rail and watch kinking the lines.

C.J.

mcutlass1969 · February 1st, 2007, 11:59 AM

thanks guys

February 1st, 2007, 06:08 AM	#1 (permalink)
mcutlass1969 Registered User Join Date: Apr 2006 Posts: 92	Brekes Proportionate Valve I am changing out the 350 for a 455 in my 69 cutlass. When installing the aftermarket Holley headers we had to move the brakes proportionate box to allow room for the header. Not sure why that had to be done. Figured the car was designed to handle the larger motor. Anyway I want to just reinstall this box on top of the frame rail laying flat vs. on its side. Does anyone forsee any concerns in doing this? Not sure of the inner workings of the box in which it has to be installed on it's side. Another thought is to move it down and back on the same frame rail.

February 1st, 2007, 06:52 AM	#2 (permalink)
Oldsguy Hot Rodder at heart Administrator Join Date: May 2004 Location: Lees Summit MO Posts: 6,619	Just be careful to avoid kinking or bending the lines. Otherwise, I don't see a problem. __________________ Dan "The rocket 455.....it's a sledgehammer approach to a thumbtack world" LuxBlue of HAMB.

February 1st, 2007, 07:30 AM	#3 (permalink)
texasred Tom Servo's Stunt Double Join Date: Apr 2004 Location: San Antonio, Texas Posts: 833	That's the way it's done, all right. On top of the frame rail and watch kinking the lines. C.J. __________________ Dad said, "Sometimes you read Job...sometimes you ARE Job!"

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February 1st, 2007, 11:59 AM	#4 (permalink)
mcutlass1969 Registered User Join Date: Apr 2006 Posts: 92	thanks guys