ok im working omn a rear disk swap on my 88 crx, i have the 4040 prop valve and the complete rear disks from a 90-93 integra. now ca i use my stock M/C? or do i need to use a different one? i do have a M/C from a 90-93 integra also but it clearly doesnt bolt up to the brake booster

 

You don't need the bigger MC, I would only upgrade it if you were getting bigger front brakes. Use the Teg MC and BB if you do decide to get bigger front brakes though.