gday guys im converting my xg ute to a v8 got a 91 winsor that im stroking to 351 for a god cruiser the thing is ive got a t5 from a 6 there i know that there is a small size difference in the length of the boxes,what i need to know will the box stand up to a v8? and what sump do i use? xa-xb?

Problem is the engine needs to be the same year as the car for legality.
You will need the engine mount adapters ( the ones that bolt to the engine crossmember, and the engine mounts bolt to them ) from a V8 car ( XA to XE )......and NO....that 6cyl box will not do.
Being a Windsor....the sump needs to be from like an XR, XT, XW.....if, they even have the same bolt pattern....????