I've heard something about an ohm resistor??????? R-12 is worse for the o zone i'd rather not use it. Anyone know if this is at all possible?

Remove and drain the compressor of the oil. Replace the condenser & accumulator. Flush all lines and compressor. Replace the service ports with R134a quick disconnect service ports. Add the required amount of PAG 150 oil to each component. Vacuum and then recharge the system.

But the sensor won't recognize r134 there for the compressor will not cut on..... right? They weigh different? I think?

I did the conversion on my '87 DeVille back in '97. Compressor was shot, so I decided to change to 134 instead of paying the going rate for R12. I replaced every 0-ring at every connection/flushed&back-flushed the lines, condenser, evaporator with denatured alcohol/replaced accumulator/new orfice(White) tube/port conversion fittings and added PAG oil to accumulator/compressor. Evacuated the system.....vacuum pump was On overnight and the system gauge read the same in the morning as it did the evening before. Added 80% of the R12 charge according to FSM instructions on 'charging' and hit the ignition. No problems with the sensors. 42dg air in 100dg+ Texas temps.
Last Summer I had a leak in the High-side port....bad Schrader valve, so I also replaced the accumulator and orfice tube. 12yr old tube was in good shape. I used a Blue Ford tube this time.....keeps the evaporator 'flooded' a tad longer.
I should have replaced the Schrader valves back in '97 but didn't think of it. If you do it, use plastic-seat valves, not rubber-seat. I've had ZERO problems with the AC system since the conversion, other than the valve. The complete job cost me about $300 using a New compressor.

Yeah, I've never heard of sensors being a problem.

Well mines filled now and holding at 50psi and the code won't cut off?(so the compressor won't cut on) Thank you guys for all the help tho.

Low-side pressure should be reading in the 30s. R U using a manifold gauge set? High-side pressure reading? Have you cleared the code by using the computer code-clearing procedure?