What would need to be done to convert a 1993 Chevy 350 tbi 4 bolt main to use a carburetor?

umm.. first of all I wouldn't do it.. tbi is nice... not only that.. But it would mess up the computer of your vehicle.but if u still want too and didnt care.. "kinda like me when I did my engine for my Chevy caprice".. all you would need is a new intake and carb.. but of course I replaced the whole motor distributor and everything.. Then cut all my wires to the engine compartment and wired up the basics all new.. not too difficult