We are working on this http://bangshift.com/blog/1957-chev...ring-lots-of-photos-truckin-awesome.html and I need 2 sets of 4.56 gears for HO72. This truck is incredibly clean and all complete. We are just going through it for the owner and putting a NV4500 overdrive trans in it without doing any cutting, grinding, or drilling so the SM420 will fit right back in and nobody can tell the overdrive was ever there. The first thing everyone that walks through the door asks is if its for sale, its not, hes wanted one for quite a while and not giving it up. Jon