68 Fury lll Fasttop

Good morning / evening, new to your site, living in the UK with my 68 Fury and have a rear axle question for you all, I don't seem to have what is deemed a usual 8 3/4 back end !
from various searches there seem to be 3 main identification numbers, 741,742 and the other one ? I don't seem to have any of them, my numbers ( not in the usual place either ) are 2467.199 and the casting seems to have different webs , when I rebuilt the rear brakes all the 68 Fury parts went straight on, I...

68 Fury lll Fasttop
Author: ofb383