Go with the cold air intake, K&N filter, chip mod and look and see if there are
AC Delco Rapid fire plugs for your application instead of the bosch. With nearly 50K on the engine I'd hold off on the supercharger, most companies recommend not installing them on a engine with more than 75K which is not far off.
BTW I should have an update/new pics on some of the hotrods I work on in a week or so. I have some now but I'm waiting till the 46' Ford coupe is done to post them.