Am in process of putting a 85 t1 motor back together. Im missing some things and have a 86 t1 engine complete im taking parts off of. I pulled the head off the 86 and it has dished pistons with valve reliefs. The 85 has just dished pistons, no reliefs. Did they change piston styles 85 to 86? The 85 i know is non rebuilt and bone stock. The 86 im not sure about. Just trying to figure out if whats in this 86 donor is correct for what it is.