Yes , the book I have said the changed from 9.5:1 to 10.5:1 pistons ,406 style heads and dual ex at 340 brake hp at 5000 rpm some time during the production year.Just wondering since it had dual ex if that is what I have ?
I am going to re build the motor and has anyone stroked one of these motors ,if so where is a good plase to get parts ?