1st try to bleed the brakes properly, then if that doesn't work get another master cylinder (91 Civic EX is best). Check for leaks too.

If you want to swap brake components: for the rear keep EF control arm, trailing arm is same on DA/DC and find rear discs from a DA. For the front use DA front knuckles and brakes, & since your CRX is not an Si I believe the axles won't go into the DA knuckles either (not 100% sure about that).