when i try to turn on the ac in my 72 it start making a grinding noise and then the belts gets loose. nothing blows either, so not sure if it is the blower motor. also does the duct running under the dash from the driver side make a difference? where is the thermostat, since it does not have the top thermostat housing on top of the block? you guys, help me figure out why i have no ac _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/