You may want to email cardone support, I've had good luck getting info from them on questions like your asking. Tell them you want a 3 turn ford rack with the dimensions of a 87 Tbird. There are two versions of the rack, one with sport suspension ,2.5 turns, and one without sport suspension, 3 turns,
ATSCO 6406 is a 3 turn TRW type.
http://www.rockauto.com/catalog/more...&jnid=2&jpid=0
This one is a non metric fittings