80 inches center of one joint to the other, 1410 joints, assuming it is 1/8 or .125 wall tube. If it's too long Sadler power in the cities could shorten and re balance it. It's cheap too. It's 5" diameter in the middle and 4" on the ends.
After my research I found that a crew cab short box duramax shaft does indeed drop right in. Zero changes needed. It's a little long I think I will end up shorting it a half inch shorter before I tow something heavy. Just wanted to pass this on
Long bed Chevys are a 2 piece also. Coltan's drive shaft would work for you just needs shortened. You will need one about 76" long. My 6 speed one measures 70.5 and should really be 70.