The XF booster will bolt straight in but the XD/XE master won't bolt on without reworking the shit out of the mounting holes.
So you have some options.
XF booster with reworked XD master.
XF booster with XF master and XF brake lines.
XF booster with XF master and re-worked brake lines.
Small XD booster with no other mods.
I can understand why you want to use an XF booster because they are just so clean and simple looking compared to the XD/XE booster, and It's why I used one on my XdEE when I did the 4.0 conversion 8 years ago, but unless you are prepared for all the extra pissin' around, forget it.
TUFFZJ reacted to Gaz in Different between ZJ and XF Brake booster ???