Same deal with Thumpers car..... once in a great while the car sees a track, yet every discussion on this topic the same two chime in on how it doesn't not happen to them. Mike you constantly chime in on this.... are you telling the OP to use the 8.75 over the D60??? Heavy big block stroker with a 4 speed. Your chit, as noted above, is apples to oranges. What a coincidence the factory put the D60 behind performance big block 4 speed cars..... guess they ran low on the mighty 8.75 and figured the D60 would do in a pinch.