This copper and brass radiator with frame has PTO opening in lower section of the frame. This is a bolt together radiator. The outlet connection angels out of the bottom tank. This radiator fits Mack RD series from 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, & 1993. The core size is 29" x 34 3/8" x 2 1/4."