My buddy has a '66 with a c4, his bro. gave him another c4 to get rebuilt for the '66 so he wouldn't have to pull his till later. He took the torque converter from his original in to the shop so they could make sure they got him the right one and it doesn't fit the replacement trans do to the replacement being for a '70 and on vehicle and the bell housings have diferent bolt paterns so he cant just get a new converter and switch bells, is there an adapter to be able to use the '70's trans on the earlier models, or is he going to have to just get the other rebuilt?