Nope, can't be done! The internal parts are totally diferent. The 14 bolt axle might swap as a complete unit, but they're way too wide. The 3/4 ton trucks with that rear end ran a 4.56 ratio, and there were a VERY few 4.10's out there behind automatic-transmission 3/4 tons. They're scarce as hens' teeth, and much more expensive! There was a Detroit Locker option in thre early 70's, but that carrier is almost nonexistent now. Most of them went into dirt track race cars in the late 70's/early 80's.
Jerry
