Add your abody driveshaft length for quick reference

its best to get the rear end installed at correct pinion angle and set it down on the tires to load suspension and measure center of rear universal cap to the center of trans yoke universal cap and deduct 1 inch seems to work best for my past experiences. Am going to be building my new drive shaft in a few days and this is the formula im using again lol hope it works same as the past 50 I have done over he years. Don't forget to have a reputable drive shaft specialist do the welding and balancing too!