I used a MC and booster from a 97 XJ. It only required shotening the pushrod and enlarging the hole slightly in the firewall. I also had to drill 2 more holes for the studs.

It stops quite well, and I also had room for the throttle cable to come out. (i've since changed it though) Not sure if it would clear the air cleaner on a stock 230, but I could post up some better pics and measurements later today if you want them.

Here is one pic you can sort of get an idea of: