ur head will have the cutouts for the injectors si u will need a blanking plate to fit a carb to the head right
u will also have issues with management, not the end of the world but i beleve the efi and the sparkie bits are linked and will mean u may want to fit a dizzy which then means buying more bits, also the cam may or maynot has the lobe for a carb fuel pump to run on (shud have but mite not)
its only a matter of changing the tank and a bit of wiring, u'd do well to keep the efi really
u can then plug in a superchip (not huge difference but worth havin) stick a filter on with a few other mods (cams and some flowing etc etc all which can be carried on to a frst conversion) 130brake is easily found and u are on a winner if you want to go to frst later too