Everything said correct. The straight six crossmember is the only different one of the pack. 4, v6 and v8 all share the same crossmember in the fox bodies. They are cheap and plentful in wrecking yards or you can get a trick tubular crossmember from various fox body mustang suppliers (lighter to be sure)

Also you will need a special crank maincap bolt to use a "double hump" mustang, crown vic oil pan and pick up. I just went through this recently on the tbucket when I was going to use a ford motorsports double hump pan. Thankfully pop had a maincap bolt in his stash of prized items (along with naked pictures of bee arthur from golden girls)

ONE WORD OF CAUTION. DO NOT BUY A SUMMIT RACING PICKUP FOR THE DOUBLE HUMP PAN! I ordered one thinking it would be a quality product and it was from china (no surprise) but would not even bolt up properly to my engine! I went to discount auto and got a melling for $20 that was perfect.

Good luck! Don Jr.