I was reading on buschur's www site just a few days ago about this; part of the deal w/ buschur sponsoring shep by building his motor was that he had to always have a backup built & ready to go. Buschur built the first motor and then a second. The first was installed in shep's car in april and the second motor, according to buschur, is sitting on an engine stand in his ship 'collecting dust' (I'm sure not really but you get the drift).
http://buschurforums.com/forum/showthread.php?t=13429