OL303 1961-1964 Oldsmobile 394 with "Slim-Jim" to Chevy Automatic Transmission (166-tooth externally balanced)

1961 Olds convertible

Works great. No vibrations, straight forward installation. Used for a 700r4. Had to do floor modifications. Well worth the effort. Like driving a different car.

1964 Olds Dynamic 88 - TH400 swap

I swapped a TH400 transmission into my 1964 Olds Dynamic 88 and used kit OL303. The kit fit perfectly and needed no customization or massaging to fit. I did have to cut a substantial hole in the floor to fit the transmission but knew this going in and this wasn't because of the swap kit. All the bolts came with it and fit where they needed to via the instructions. I've got almost 700 miles on the combination now and I can't be happier.