This adapter plate kit uses the 6.0L Ford Power Stroke starter. This is actually the same adapter that was designed for the 6.0L 5R110 automatic transmission but it also works for the 4R100, and allows you to upgrade in the future if you'd like. Two holes in the top of the adapter are not used (the 4R100 does not have these holes, and two in the bottom are either not used, or if you want to use them drilling out the threads in the bottom holes in the transmission is required.
We recommend using a stock or performance diesel torque converter for best efficiency. An aftermarket transmission controller is required for this conversion. See the overview for more information.