I wound up having to order a new master cylinder as the old one just wouldn’t go back together. It came and here it is mounted in the firewall. Also you can see in the picture is the sound proofing matting that my friend Bear did an amazing job installing. I’ll post more pictures of that shortly. The master cylinder is held in place by a shaft color that locks with a ring into a recessed groove in the body. Chris is doing the install and he turned the little plastic wings off the master cylinder body which is how it usually mounts in the OEM application. Turing the wings off allowed the master to fit easily through a hole placed in the firewall and allowed the shaft collar to clamp right onto the groove the is already in the master cylinder body.