The 3.6 you mention was the 221. Ford AU and Ford Argentina both raised the deck hieght of the 7 main bearing 170/200 and then stroked them to 188/221.

The Alloy X-flow head was joint developed by Honda and Ford AU. I shipped over a late 1987 4.1ltr x-flow six out of a XF Falcon. I picked up the EEC-IV computer and T-5 bellhousing also. I'm looking at dropping it into a 85 or 86 Fox-bodied Mercury Capri.

--J