no im thinking more like set a budget and do both to the same car. compare dyno results. build the d first and swap in a b second. my 97 coupe should work. how about a budget battle? build a d16y8 and swap in b16? can you wait years for the results? all motor d of course as it is old news that a turbo d wins this contest outright. and i guess the only fair way to do it is to do both myself and not factor in labor in either case.