I am looking for a set of rear end gears that comes in the 1967-72 Chevy 3/4 ton trucks. I currently am gathering parts for a 1952 Chevy 1 ton rebuild and I have been told these gear sets will be a direct bolt in swap that will enable me to run this truck up to 55-60 mph. I believe it is an Eaton ho72 that I will be looking for; 10 bolts hold it into the rearend and the gear set comes out the front of the rearend. MikeC