67 ss/rs with ac. Brake modulator on frame question

[67jeffreyt]

Thank you Mike, it's true on the 68 assembly manual for I don't own the 67 manual, I only noticed that it stated L48 car showing a drum brake in pic.  I just noticed the date at the bottom.  A lot of car show people I have chatted with never even knew about the valve on the frame.  It is such an interesting item on the car that is so intriguing to why some cars have it and others don't.

[67jeffreyt]

I guess I should state that GM knew why the valve should be there, but under their directions, I don't understand why my car i purchased did not receive the valve. 

[67jeffreyt]

Here is the engine bay, and no the engine is not numbers matching.  Only showing the factory air

[Sauron327]

I have a 67 L30 with A/C in the shop that has the proportioning valve. I'll get the build date info when I'm there.

I would get rid or that glass fuel filter. A friend watched his car burn to the ground years ago because that filter failed. Run a hard line.

[Petes L48]

Here's another place on this site where it's discussed

http://www.camaros.org/suspen.shtml#valve

[westonz28]

My 1967 RS L30 M20 has the valve and no A/C. March 3rd week build with 12 bolt 3.07 non posi. LA built with numbers matching engine and trany and rear. Engine is a 12 06 build for a March car.

[67jeffreyt]

I agree sauron327.  I've only owned the car 2 weeks and it's on jack stands getting a thorough check through.  I'm planning on putting  the hard line back on. Along with a year correct intake.  Winter has started and time to spend money on other people's neglect

[67jeffreyt]

Weston your car is a perfect example of how I don't understand how the assembly line chose which cars received the valve. 

[67jeffreyt]

Kurt S and Ed have been exposed to more research than I will ever know.  Is it possible at any time that maybe the valve failed and somebody could have replaced the line to one piece.  Maybe that the valve had no replacement available?  I would think somebody would just piece it together.  But the camaro i have isn't following assembly line rules.

[Petes L48]

My 1967 RS L30 M20 has the valve and no A/C. March 3rd week build with 12 bolt 3.07 non posi. LA built with numbers matching engine and trany and rear. Engine is a 12 06 build for a March car.

What's the factory brake setup?  Also, is the partial VIN stamped on your L30 engine block?

FWIW, in the 67 AIM that sheet shown in reply #7 from the 68 AIM is found under UPC C60 Sheet A9, not under UPC L48.

[Petes L48]

Kurt S and Ed have been exposed to more research than I will ever know.  Is it possible at any time that maybe the valve failed and somebody could have replaced the line to one piece.  Maybe that the valve had no replacement available?  I would think somebody would just piece it together.  But the camaro i have isn't following assembly line rules.

Looking at the AIM sheet, it appears a thread cutting screw (p/n 9420625 isn't in the AMK catalog) was used to attach the valve bracket to the subframe.  So if it had the valve and it was later removed, you should find (unless it's too heavily rusted to determine) a subframe hole showing signs of threads cut in, just forward of the hole that the bracket tab goes in.  And if it never had the valve, I'm thinking there would be two subframe holes with no signs of threads cut in the forward hole.  I can't imagine that screw 9420625 was a self-drilling type that could cut its own hole through the subframe.       

[67jeffreyt]

In my first post Pete I posted a pic of my brake line.  But illook at it closer to see if I can tell if there are any threads in the frame. 

[Petes L48]

Went back an looked at your picture, to me it doesn't appear to have any signs of threads cut into the front hole.

[westonz28]

"What's the factory brake setup?  Also, is the partial VIN stamped on your L30 engine block? Pete L48"
Drum brakes all the way around.
No Vin stamped on low hp cars.
Brother in law bought it off the lot. Have P.O.P and order sheet and order computer punch card for the Camaro. All numbers matching with original sheet metal. Just took the vinyl top off and had the roof repaired and repainted it the correct color and redid the seats, carpet and dash pad. Engine and trany have never been out off the car.

[camaroboy68ss]

My 68 L30/M20 has the valve. Factory power brakes, disc/drum. Its a LOS built car, but all factory 12 bolt cars in 68 were supposed to get the valve. 

weston- unless it changed between 67 and 68, your L30 block should have a partial vin on the pad. The L30 in my 68 does.