1991 Lincoln Town Car AC Clutch not running continuous

Hi,
I will explain to you exactly what is going on and what I have did to try to fix problem. First I am not a mechanic but I have knowledge of some things that I try to fix on my car when it breaks or need repairing.
I bought a 1991 lincoln town car and I am fixing it up to my satisfaction to drive. When I bought car the person told me that the ac did not work and he was told it was the compressor. Well I took car home and I thought I would try to put freon in car to see if the ac compressor was messed up. I put the freeze 12 freon in it because I wanted to do it myself. Well I got the freon in the compressor and the clutch started working great but the inside of the car was not cooling, come to find out that the blend door actuator was nor working. I park car and started to fix other stuff on car when I heard a hissing sound coming from under hood, when I open hood I saw that the compressor had blew the rubber O ring and the gas was leaking out. And I also come to find out that the car had been retro fitted to the R-134a and I did not know that before I put the freeze 12 in the compressor. I do not know if this had a effect on the O ring blew out or not. I put a new blend door actuator in car( that was ha heck of a job, had to drop dash down to get to it) and I went to junk yard to get another compressor for car I put compressor on car but clutch would not kick on so I filled it with R-134a refrigerant EZ chill plus oil and safe leak sealer. Clutch would come on for about 2 seconds and stop for about 2 seconds it would do this continuously and the inside of car would not cool. I took this compressor off a 1994 lincoln town car from junk yard, everything was exact on compressor but the electrical connector for clutch. The original compressor clutch electrical connector was on top of unit, the 1994 connector was down toward the bottom of unit, I do not know if this had a effect on the workings or not. So what I did was to take the 1994 compressor apart and I took out the O ring and I installed it on the original 1991 compressor. I also cleaned out all the old oil and refrigerant from the original compressor and I put it back together. I insalled it on car and filled it with about 1 and a half cans of the EZ chill R-134a refrigearnt plus oil. The can was 12 oz plus a half a can. Clutch on car started working but again would only work for about 2 seconds and stopp for about 2 seconds and it would do this continuosly, but the air on the inside of car was cooler than it was. I figure if the compressor would stay running the air would get cold. My problem is what is wrong with compressor clutch to stay running continuosly? Do I need more refrigerant or is it something else?
I know this was long but wanted to let you know everything that I observed and whar ac was doing.