I can't see parts from a Dana mixing with an Eaton HO52 rear end. It's been a long standing issue for better gearing for those rear ends with no quick fix. I swapped the entire Dana 60 rear end out of a 1969 F250 into my 49' 3600 that has 3.73 gearing. Had to weld on different perches and have the drive shaft shortened and a yoke put on to match the Dana 60. Works beautifully.
