Can anyone tell me if these parts look to be original power disc brake parts on a 69 Chevelle? The car is currently equipped with 4-wheel drum brakes but the front brakes look like they could originally have been disc.

Thanks

Steve

Steve I don't believe they use that hold off valve or proportioning valve on a drum brake car.....Hopefully a 69 person can verify that, or possibly they recognize the casting or part number off of your master.

The delay valve looks like the one I took off my car 10 years ago. The MC looks similar too, (round body) bu I don't recall bleeder screws on the side of the unit.

Steve if that number cast into the side master is 5468309 you may have the correct master you need to put disc back on that car. My guess is your car may have come from the factory with disc brakes and someone removed them for some unknown reason.......:yes:

I see that your car is Daytona Yellow. Is it a SS? Do you have a 396?

Because based on this (http://www.chevelles.com/shop/ss_ident.html):

There were two colors that were exclusive to the '69 SS. "Monaco Orange" (code 72) and "Daytona Yellow" (code 76). If either of these paint codes appear on the cowl tag (and the cowl tag is genuine) then that would prove the car to be a genuine SS.

(...)

From '69 on, single-piston disk brakes were STANDARD equipment with the SS package. These brakes are easier to find parts for than the earlier four-piston disk brakes.

Chevrolet literature indicates that the only way to get a 396 was with the SS package.

The hold-off valve is definitively for a disk brake system. Drum brake don't have them. It seems odd that someone would add that hold-off valve and the front brake line that goes with it. Then again, it also seems odd that someone converted disk to drum! The master should be a 1-1/8" bore for disk and 1" for drum. Plus, there would be a residual pressure valve in the front port of the master of a drum brake and none for disk (you can check it with a small wire through the port). If you do have a master for disk and you are running drum, it should affect your pedal feel (low and spongy pedal).

The hold-off valve is definitively for a disk brake system. Drum brake don't have them. It seems odd that someone would add that hold-off valve and the front brake line that goes with it. Then again, it also seems odd that someone converted disk to drum! The master should be a 1-1/8" bore for disk and 1" for drum. Plus, there would be a residual pressure valve in the front port of the master of a drum brake and none for disk (you can check it with a small wire through the port). If you do have a master for disk and you are running drum, it should affect your pedal feel (low and spongy pedal).

Jack, I believe this car was stripped and left for dead many years ago. The engine, transmission, wheels, front brakes, steering column are not original to this car. and were replaced. There have to be a lot of Chevelles running around out there with parts from this car. Would you guys return them please.:)

The car also spent part of it's life as a drag race car.

I find a new mystery on this car almost everyday. One things is for sure it is one heck of a fine car now and runs and drives excellent.

I have ordered a new disc brake kit to put the disc brakes back on the car but Bill and I were thinking it might work to use the original parts that are still on the car. Would they work OK?

Thanks again,

Steve

If it has Drag Car history, I've heard of guys swapping front disc to drums to save weight. Just a thought.

The car also spent part of it's life as a drag race car.

That explains the drum brake conversion. I don't know if they weight less, as stated by mmurphy77, but I heard that the primary reason to do so is because the springs retracts the shoes from the drum, hence reducing the friction when the brakes are not applied.

I have ordered a new disc brake kit to put the disc brakes back on the car but Bill and I were thinking it might work to use the original parts that are still on the car. Would they work OK?

I'm sure they'll work fine, especially if you are using original calipers and disks (or a kit compatible with original equipment). The only thing I cannot be sure is the bore of the master, but if there's a great chance the car was originally with disks and it is presently used with the hold off valve, the chance that it is not the right master for disks are next to none! Furthermore, the residual pressure valve not included with the master for disk brake - and necessary with the drums - is there to keep a 10 psi pressure to keep the springs from retracting the shoes too far (Which mean that you're gonna have to push the pedal lower before applying the brakes). But since the master for disk brake is larger and moves more fluid, that might explain why you don't see any difference in brake performance (hence, confirming it is a master for disk brake).

I know paint color is easy to change but check that cowl tag. It cost nothing and if you see that code 76, that would be awesome, you have a SS car!:hurray: