So I have have a 93 Civic CX that the previous owner did a rear disc conversion on.

I'm replacing the brake master cylinder as well as the brake booster since they are stock and are faulty =(. I picked up new Integra RS booster and master cylinder.

I have the booster on and am attempting to install the master cylinder. When I push it on to the booster it isn't flat against the booster, there is maybe half inch to an inch gap.

My question is, is this normal and tightening down the nuts will "force" it in place? Or is there something that I am missing?