I have a complete center chunk with 4.56 ring & pinion gear. It is 28 spline posi unit. Was in a 70 Mach 1 I purchased that is too much for my style of cruising. Removed last fall. I also have a Fairbanks FMX 2700 Stahl converter. Asking $350 + actual shipping for center & $1o0 + actual shipping for converter. Contact me via e-mail: [email protected] or local sale 10 miles outside Pittsburgh, PA. I can send pictures via e-mail.