Is it wrong to ask if there's been attempts to reunite the motor w/ car existing car #40?.
http://cgi.ebay.com/ebaymotors/Chevrolet...568864225QQrdZ1
If this is indeed the original engine shipped between the rails of ZL-1 #40 and has not been decked, the value of this motor alone should greatly influence the value of your friend's clone?.
~ Pete