i wouldn't spend much money on the d15b2...some of the parts won't even swap over if you just upgrade to a stronger d series engine (i.e. a cai on a dpfi unit will not fit one on a mpfi b/c of the different intakes)...just drive it around...gut it if you are going to do it anyway and save up the money for the engine you are getting and buy it earlier than you would have if you bought mods for the d15b2