So, I discovered that counter shaft is the same for 75-79 cast iron cases as the aluminum cases. It looks like both the cast iron overdrive case and the aluminum case are are made the same or a at least very similar. The difference in the counter shaft is going to be non od cast cast iron cases and boa both overdrive cast cast iron and aluminum cases. it it's looking like the case swap a case case to case deal. Looks like is going to b getting the correct rebuild rebuild kit as there 2 different kits, one four cast iron overdrive cases and one for aluminum overdrive cases. will putting putting the guts off the aluminum case into hey cast iron case brewers advice on the proper kit. Thank you for your input and keep the info coming!