difference between a833 & a883

I think your asking about a 18 spline or 23 spline imput shaft? The 18 was called the Hemi box.
true and belive it or not they came behind some max wedge 440s also.. and there is no such thing as a883 its all 833 and new process 833 with the lower first gear and 3rd and 4th gear fork swithched around basicly 4th on a normal 4 speed is 3rd on a new process. and od is just so high its not funny thats why 2nd to 3rd on a new process is such a big rpm tourqe curve loss