i don't know much about engine rebuilds and what not..
but...
depends on what exactly you will be building?
i mean... r u rebuilding every part?
eg.. rods, piston, cams etc etc...
if your getting after market and forged, custom and all that then wouldn't it be smarter to just get a normal rb25de?
your gonna strip it and replace/build pretty much everything?!
so i don't see the point of paying extra for parts u dont need/won't use.
unless your not doing a full rebuild and just here and there parts then obviously better to buy det engine as stronger components?!
hope that helps.
correct me if im wrong guys!
=)