The t's frame is a home made frame, it is made on the order of a "A's" frame, meaning it is pinched in the front and follows the skin of the body.It is not Z'd but the frame ride height is only 4.5" from the ground at it's lowerst point. But the oil pan is 6.5" from the ground, The frame is the lowest thing on the whole car. The floors are even with the bottom of the frame so I can set lower in the car. The frame is made from from 2+5 steel . The car is to be finished as a Rat rod. meaning ruff but strong and safe it will be painted by rattle cans, that way I can change it any time I like.