Originally Posted by Kai
The D15B7 is basically the stock 4G DX engine plus a MPFI system, so there really isn't a good reason to swap unless his engine is near dead.
If he used his stock DPFI system on the new engine, it would perform exactly the same as the original.
mpfi will give them more power over the dpfi system (though i agree that the engine is basically the same) and get them ready for a more serious swap that would require mpfi anyway