I've got a '66 C10 short box step side truck. Its got 4:77 gears in it, which is great for hauling a load of gravel, not so hot for highway driving. My neighbor has a rear end out of a '70 Chevy 1/2 ton, its 3:73 ratio which would be much better. Anybody know if its a straight swap to bolt those gears in my '66? Any tricks or troubles? How do I check if the gears from the '70 are in good shape?
Thanks!
Erik