I have an 2004 Acura TL - decent condition

2 make a long story short.....

-truck backed up into me in June 2007 and his hitch went thru my front end and radiator etc...
-Acura referred me to a body shop...they did the work...
-December 2007....car overheated...blew a head gasket...and the rest is history....
-Another Acura dealer (where car is now) mentioned that it was a possibility that when they put the radiator in that there is a possibility that there was some sought of restriction to the radiator/coolant system (leading back to body shop)
-but they cannot verify it UNTIL they put in a engine...that they r asking me to pay for.....until then I/they cannot prove that the auto body people did anything wrong...
-and my insurance covered the accident but they WONT cover the engine...they said talk to the auto boby shop....but we have to prove it first (put the engine in and let them track the flow of coolant)


what would u do???

...sell the car in current cond.???
...put engine in???

...any suggestions?????