About halfway down this page it'll tell you a bit about the 1g cam angle sensors:
RRE Instructions

Which two do you have to choose from?

I have the 89-90 on my rebuilt motor and the 91-92 on the old motor. so are they just plug and play? what do I need to get the 89-90 version working on my 92 talon?

I would use the 91-92 CAS (has the plug on the CAS, not the pig tail coming from the CAS), but I believe either will work. Th 91-92 will be plug and play.

All 1g CAS's are adjustable. All 2g CAS's aren't. This is why a lot of 2g owners switch over to a 1g CAS.

Just bought a new one for my car $270.00

It really sucks.

do you guys have a link to some resource on how to remove and install the cam angle sensor?

To remove:
1. Remove the 2 nuts holding it on.
2. Unplug harness from CAS.
3. Slide off studs.

To install:
1. Set engine to TDC. Do this by rotating the crank pulley CLOCKWISE until the cam gear timing marks are lined up. You can check if the engine is at TDC by pulling out a spark plug in either cylinder 1 or 4. Then stick something long and skinny down into the cylinder to feel where the top of the piston is at. Most likely the object won't go down very far at all, which will tell you that the engine is at TDC.
2. Go to the link I posted in post #2 and scroll about 3/4 down the page. You should see two CAS images side by side, one lined up 180* out and one lined up correctly. Make sure the CAS is lined up correctly.
3. Slide onto studs.
4. Put harness clip on as well as the two nuts, and tighten them down.
5. Start car and let it get to operating temperature.
6. Follow this VFAQ on how to set base timing for a 1g:
Engine Timing

thanks guys.....