I have 3 of them and they are an easy .15 behind a good bigblock, I turned my street 69 6 pack into a stocker and when i replaced the trans from a well built 727 to a protrans I picked up .17 which part was due to a better convertor. Dave and Darren Smith are great to work with and if you need a quick turn around that is no problem. As far as longevity I have put well over 200 passes on my Max Wedge Stocker with only frequent oil changes. Are they pricey yes.

Max Weg