I spent alot of dough$ on internal engine mods streetport,engine balancing,oil&coolant mod's,extra dowel pinning,among other things I wanted an engine capable of generating high HP and a set of worn housing's isn't gonna help my cause,especially longevity wise.It be a real waste to spend all that $ on performance work and end up using used housing's.Simply I wanted to start out with as many new part's as possible.