I installed mustang II brakes, not GM, and ordered the stainless brake line kit with adapter. I put the adapter into caliper and then screwed the stainless line into adapter. It was almost like the threads were slightly different. It took a lot of force to get the line to go all the way into the adapter that was screwed into the caliper. Did I just screw it up?

In other words, you put a set of flexible stainless steel brake hoses onto the FORD calipers (front) and they needed an adaptor to mate to the caliper?

If the thread pitch seemed different, it probably was. You won't know until you have bled the system and apply the brake. Do it on stands and not on the street. Hopefully the adaptor was brass and can be replaced cheaply. They may have given you the wrong adaptor or hose for that matter.

Good Luck with it and let us know how it turned out.

Thanks, I'll go ahead and bleed them before I panic...

Thanks, I'll go ahead and bleed them before I panic...