Posted for Walter Atkinson <walter@advancedpilot.com>:

 Will:
 
 There are significant issues to overcome.  Weight.  Tolerances for the
extreme conditions. BSFC, to name a few.
 
 Walter
 
 
"""
   Bit of a subject change, if you're up for it--I wanted to get your
 feedback
 on alternative engines.  Specifically, it seems to me that the GM
 LS1/LS2/LS6/LS7 engines are real candidates for high performance aircraft,
say
 Legacy/LIV/LIVP.
"""