You started this thread with putting a cam for supercharging in the engine. With all the other rabbit holes you have gone down you need to examine where you are going with your project and the timeline. An external analysis would suggest that you just drive the car, and prep/build your drive line, then install it as a unit. Your least cost would be to build an engine and trans to handle the power. You can use a built compatible trans, and you will get the job done with the least down time, and least cost.