There was a kit to convert to Hubs.I did mine on my 79 Ramcharger.The kit was in a 73 I bought.Ther was a bearing you had to install in the case also.Been like 25 years since I did the swap though.I know if the knuckles are even a bit bad they will eat new bearings.had to replace one set twice.Then i got a good used knuckle.Rocky