Used 360 price

I am looking into buying an used 360 for my 1965 Dodge Dart project.Says it does turn over and he does keep it up sealed up in his shed.My fiancée Brent's cousin Jake has it and said it is mine for a good price.Said it did run very good before it was pulled out of a 1979 Dodge 3/4 ton truck.It is going to replace a worn out 273 that smokes a lot.I do know that the torque converter has to be changed as well because the 360 torque converter has a counter weight on it.My dart does have the 727 automatic.What is good price for this 360?I plan on tearing it down anyway.