Turbo 383 in a A-body Barracuda

well just came home with all the reilly motersport supension for the barracuda very well built stuff Bill is great to deal with and full of lots of good information bad part about doing this swap is the 15 inch wheels and tires i bought wont work :-(:-(:-( so after talking with Bill for several hours i figured out what i could use it was nice of him to show me different setups on the cars he has sitting there anyway just ordered new tires and wheels going to run 255/40/18s on the front and 285/40/18s on the back with the nitti 555 all the way around also just recieved my new radiator and fan, new seats, TTI exhaust (the tips fit perfect), painless fuse box, type 2 power steering pump and remote tank, and danso mini alternator man is it small