If I use a blue or black motor than I already have in my possession instead of a red motor for my HZ the the van have to run the emission controls etc for the year that motor came out with or is it pretty much the same as if a had a date correct red motor, I do have an old red motor 11QT Statesman? that needs rebuilding or I have the choice of keeping the blue which is currently in it or a black 308 I have in a HX ute both have m21's bolted up them where as the red motor would need an adaptor or to be redrilled for M21.