Quote:

Other than the "Made in Canada" and the pt.# stamping on the base,no difference.All done with the original tooling.



Unless they were retooled again after 1971, the MP base has one very significant difference that sets it apart from an OEM part. The notch in the base.... original parts have a small notch on the front just to passenger side, the MP piece has an even larger notch towards the driver's side of the car. I assume so it can clear a small block upper radiator hose, despite having never been originally offered on a small block car.