Actually, the efi sensors are about useless in this scenario as they do not read boost. You'd end up tricking the fuel delivery with a FMU of some sort to keep them happy. The only real sensor of concern would be the map sensor, which cannot read boost, well the stock ford map cannot read boost.

Taking care of the fuel delivery whether efi or carbed is a no brainer, just call any reputable company and they will have something to offer.

The hard part is fabrication. Sure a supercharger would net you low rpm TQ by its nature but so would a well matched turbo. Advantage would go to the turbo for ease of installation. Fabricating brackets and adapter flanges for the supercharger seems like too much trouble, as compared to laying out some piping.

As far as tuning the speed density system, the advantage would go to the supercharger, as its power is predictable aka linear, as opposed to the turbo. If you have a carb setup, run what you like.

IMO, if you have efi, get a supercharger kit for a speed density 302, then its a matter of fabricating the bracket, the other bag of tricks you'd get, you can use for the fuel delivery.

A little inspiration for a carbed setup, go to the gallery and look for one titled "matt's 67 pro street".

Good luck with whatever you decide