Borgeson Universal blueprinted Saginaw 525 steering boxes are stout units that have withstood the test of time. GM started producing these boxes in the '50s and still use versions of them for production vehicles today. The 525 steering boxes are available with a 1 in. or a 3 1/2 in. long input shaft with 16:1 or 24:1 steering ratios. Reversed boxes are available.