727 trany question

It's heavy duty emissions pacakge. Internally there's nothing different and what you should have is a plain 727A transmission. A heavy truck would not have a lock up - that was for light duty stuff back then and the input picture is a plain 727. Great find. Teh heads are someof the best LA heads you can get and the transmission should have the 4 pinion planetaries and 4 disc front clutch, plus the "factory high stall" convertor.