it depends on your version of fast
bolt ons on a NA d series will net you 15- 20 hp depending on how far you go into the bolt ons
the only way to get true hp out of a d series is boost or nitrious or swap in a faster motor to do any of these however you need to increase your budget as ron j said
what kind of power are you looking for?
you need to come up with a hp goal and how you want to achieve that goal and do some research and come back to us
you will spend the grand on bolt ons and like i said above net you not very much 15-20 is actually a high estimate or you can up your budget a little and piece together a turbo kit you can safely go to 200 or a little more hp on stock d series rods