2500 rearend to c&c rear measurment?

was wondering if anyone no's the difference in length from a 2500 rearend to a C&C rearend?
also if i were to run a 2500 rear with semi's what size spacer would you suggest i run to fill the fenders back up again?

im runnin a 2500 rear with 6 semi wheels...you have to run all 6 to clear the 2500 brakes...anyhow the rear is 8 1/4 inches shorter than a stock 84 model rear(not sure if a 84 is the same lenght as other body styles) and it worked out great for me...ill post pics when i raise my fenders next week to show how far they sit in teh fenders but accordin to my tape measure it should be right at 1 inch

thanks for the measurement on the 2500 and pics would be great

2500 rear should be around.. 47 inches from back plate to back plate and a c &c rearend should be about 44 inches from backplate to backplate.

perfect thanks