alex.
the AU sump bolts to the bottom of the crank to give support.. and also it is a cast sump.. not a tin sump.
unless your gonna get a cast sump made to suit (expensive)
EA --> EL motors fit because the sump is Tin and can be modified to suit the car.
and the AU head can bolt up (except the VCT heads which cant)
but theyre still is the other problems related in a 4.0L swap. wiring up the
ecu, engine mounts, fitting the motor.. but if your gonna do the swap.. then you'll be able to overcome these as theyre is a few people who have done this now.
try this link for some pix and info from an older thread on the swap.
http://www.fordforums.com.au/showthread.php?t=100520