73schwing

hey everyone this is my first post and im still learning a lot considering that im 17 so anything anyone tells me i find it very helpful so please chime in if you like well here is the deal over last summer i bought a 1973 dodge dart swinger with 318 and i believe a 904 trans and i want to upgrade anything and everything i can with out breaking the bank and also since its stock will both tires spin? or will i need to something to the rear diff and if your wondering i want the car to be like track car so basically if you were 17 what would you do to the car? i want it to be fast burn rubber and look good ya know well anything helps sorry if this post is all over the place