69 Firebird Disk Brake Master, 69 A body? Interchange
 

I need to get my car moving very soon, 69 Firebird with power disk brakes.
I went to install a 69 GP master (aftermarket) and the rear line fitting is too big.
Who knows the details on the interchange?
The '69 A body master is supposed to interchange between the Olds, Pontiac & Buick A bodies.
The '69 Bird interchange looks to be just that, '69 Bird. Hard to believe that only 1 year, 1 model fits.
Any experts out there?

There are a lot of 1 year only parts on the 1969 birds. That's kind of par for the course. With that type of deal you need to either find the exact part for 69, or convert almost everything.

It sounds like you need something like this.

https://www.speedwaymotors.com/GM-Di...lets,9878.html

Anyone know anything? Been waiting on a new master only to find it is back ordered :(

I dont know if thats 69 Bird specific. I know Ive ran into line kits being the wrong tube nut size before. And that was with line kits that came with the master. I just bought a selection of 3/16 tube hardline nuts off amazon and made my own line for that spot.