master cylinder thread and pitch size?
 

I'm working on my friends rx3 wagon and it's using a 12a engine and transmission out of a '79 rx7, spark yellow I might add. The hard line is trashed and I don't have the soft line yet. Need to know the thread and pitch size on the clutch master cylinder so I can run over to autozone to get a replacement hard line or order one now. I would figure it out myself but both of my cylinders are in use and my friends car is an hour drive away. Please help :) needs to be on the road ASAP.

Check out this post I found in the first gen section when I searched.

https://www.rx7club.com/1st-generati...asters-970904/

"The only thing I know for sure is that the thread size for the fluid hard line changed over the years, 79-80 is M10x1.25 and 81-85 is M10x1.0 not including the GSLSE, I put an 83 master and slave in my 79 with no problems."

Maybe its time for ur friend to convert that RX-3's complete brake and front suspension to 81-85. I've done and it works like a charm...stops so i can pick up a dime ala winston tire commercial

Sorry been on my phone the past couple days due to work.and.family business. Sorry for not searching but thanks for the link. The brakes.aren't a big deal for right now, it was getting the clutch to work was a big deal.