what are some things that can be done to the D15B7?? couldnt find much out there for it. thinking of swapping for a B16 or a GSR motor. but i dont want to give up on the D15 just yet. any help would be appreciated.

its good for driving from point A to point B.

i was just thinking of that. If i could find high performance bits like pistons and valves/valve springs and be totally anal about engine oil and maintenance, i figured it'd run for as long as i live.