Am about to get my driveshaft shortened. When i looked at my friends in his 70 383/727, the stepped down section of the drive shaft was at the diff end of the shaft. On mine , 318/904, the step down is at the trans end. Is there a right and wrong way ? I have seen a pic of Burder's driveshaft (pg 15 resto) and his has the step at the trans end. I have to shorten mine by about 3 1/2 inchs. If we took this out of the trans end we would nearly lose the narrow stepped section.