Brake upgrade for Capri

[XRQTR]

Hey folks, just wondering if anyone has done a brake upgrade on a V8 Capri and what you used, the brakes are actually up to the task of stopping the car that's not the issue, the issue is holding the rear from breaking out when trying to stall it to launch RPM.

I have a 9" that I will do if necessary, however the V6 diff is holding up ok, well that might also be because of the lack of traction I'm worried once she hooks up she'll snap something. The 9" can be set up no probs, it's a disc brake jobby from an XB/C from what I've been led to believe so would be more than capable of doing what needs done.

My main issue of course is to do more with the Master/Booster set up, does anyone know of something that would bolt straight in without having to re-drill or use adaptor plates. I'd like it to be as clean as possible, I have a vac pump but wanted to hold that for the XW as the motor in that will be much bigger again.

Thanks in advance for any help on the matter.
Stef