After upgrading to the bigger Integra Brake Master Cylinder, the rear threaded hole on the side of the cylinder is a larger 12mm size thread. All EG’s use 10mm nuts so the rear one will not bolt up to the brake hard lines. This will require cutting the brake line on the EG and removing the 10mm nut, sliding the new 12mm nut on, and re-double flaring the end of the line (pics to come)
I was able to find the larger 12MM brake tube nut of a non-abs integra at my local junkyard, here is it compared to a regular 10mm size nut:
Here is a shot of them screwed into the master cylinder for refrence:
