Well if they left everything under the dash and tubes to the expantion valve are still there and not damaged your more than half way to get it up and running, the location of the compressor on a factory car is on the passenger side, alternator is on the divers side , add on air is the other way around , and you should have a double pulley , I have seen over the years that a engine change people would put an engine from a non AC pinto and just yank everything out , got a compressor if you want it but have no engine brackets , guess the front condenser is gone also, you may find one here or go to a you pull it and find the largest one that will fit , the newer 134 gas needs Ito have a larger one to work better , then you can have hoses made to fit along with a new dryer then your good to go, unless the ones who did the hack job cut the tubes off the evaporator at the firewall , 😵