Thanks for the input. This car was never driven hard. I'm afraid that if I drive it hard or modify it to get some more horsepower that the motor will not hold up. Does anyone know if this is a 4 bolt main or the 2 bolt with the 3 plug? Is there anyother way to tell without pulling the oil pan? I'm told the 2 bolt is the more desirable of the 2 because it will take the higher RPM without coming apart should it be modified.