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.