Big Brakes ups and downs

Hi all,

I desperately want to change out the brakes on my 90 hb. I first plan to do a rear disc conversion, and get the new prop valve, m/c, and booster from a 90-93 teg. I know I also need the trailing arms, Rotor, Caliper, Ebrake Cables, anything else?

Is this the way to go? Are their any alternatives for the rear? Do Prelude or GSR rotors and calipers fit? What's involved in going bigger.

And what's the story on the front? What kind of brakes can I replace?

This next ? is a big newb ?, sorry. If the front brakes on my civic are 9.5, and the 90-93 integra brakes are 9.5, is there any point in changing them?

What options do I have in front brakes and what's involved in their changeover? Are the big gsr and prelude rotors compatible with my civic or an upgrade from the 90 teg?

Any options or opinions I'd like to hear guys!

Thanks