The trans in the car pic is the 727. The 400 fills that space up at the tail. You can easily mod your existing crossmember to take the 400. The mount winds up almost in the middle of the factory crossmember. Cut off the 727 mount pad that comes off the front. Then cut the center lower and weld in a plate for it to sit on. I'll find mine and take a pic. Looks like hell if I remember, but worked just fine.