What's the deal with these two different styles of master cylinders and which one is correct, top pic, bottom pic, or both?

http://www.mershons.com/photos/4278c.jpg

http://wwwheels.com/cars/A1407152_1.jpg

I have done a search on this topic, but was unable to find it.

Thanks, MR

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69 Z/28 X77, Fathom Green, 34,000 Original Miles
69 SS 350, Lemans Blue, 350/300, TH350, 5 X 34,000 original miles http://www.camaros.net/forum/smile.gif
(bought it when I was 15)

[This message has been edited by MAXIMUM69 (edited 01-21-2001).]

I believe the upper short master is correct for any first gen with disc brakes.
The lower one is what I put on my car years ago when I converted to four wheel discs from drums on my 67.
It is what the EIS catalog showed as a replacement master cyl for a 69 Camaro with JL8 brakes, but I believe the short master is the more correct one.

I know the tall master was used on early 70's pickup trucks. And was recomended for racing use for the Camaro as it has more brake fluid reservoir capacity.
The bore size should be 1 1/8" for power brakes and 1" on manual brakes either discs or drums. The manual option was only available in 67.
Many cylinders will work but the short is correct as far as any books I have.
REF- THE DEFINITIVE 1967-1968 CAMARO Z/28 FACT BOOK by Jerry MacNeish

I have resto catalogs that show all shapes of master cyls for the 69 cars but they must be replacement masters, not origonal.

You might take a look at the Master Power Brake web page and see if they show any photos of master cyls. http://www.mpbrakes.com/
David

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Check my web page for First Gen Camaro suspension info:
David's Motorsports page (http://ourworld.compuserve.com/homepages/David_Pozzi/)
First Gen Suspension Page (http://ourworld.compuserve.com/homepages/David_Pozzi/first_gen_suspension.htm)
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Can Am Vintage Racer

The master in the top pic appears to be correct. There were 2 casting numbers for 1969. Very early production cars used the '67-'68 master #5460346, later cars used #5468309. Production masters had bleeders, service masters may not.