A-518 and 46RH find

My biggest concern is getting the lock up clutch in the converter to live. I will wire mine up on a toggle switch to only use the lockup when up to speed on flat level ground. That and a heavy duty plate style trans cooler. IIRC precision transmission had something in one of their youtube videos about increasing the apply pressure to help.

727's lived fine in them without a lot of problems and the 518's are very comparable inside the front case.

Might spend the money on alto red clutches and kohlene steels but haven't made up my mind. May just try to figure how to get an extra clutch in each pack using stock stuff.