Sounds like a good deal with the new ac....... might want to take it for a good drive to make sure it doesn't get too hot. Also check to make sure cooling system isn't under pressure when cold... before you start it (indicates head or head gasket problem).... also look for oil in coolant or coolant in oil. I can't think of anything else to check right now.

__________________
1985 300D Turbo ~225k
2000 F350 (Powerstroke) 4X4, SWB, CC, SRW, 6spd ~148k
1999 International 4900, DT466e (250hp/660 ft/lbs), Allison MD3060 ~73k