Anybody know a good site where I can learn how to replace my mass airflow sensor, its an '85 V6 2.8L.

 

It's very easy to replace your mass air flow sensor. Do you already have the new unit?

 

It should be somewhere inline between the air cleaner intake and the throttle boddy on the intake manifold. Just follow the tube. Then you can see how it attaches. If you got a code dont forget to clear the memory by disconnecting the battery for at least 30 seconds.
Keep in mind though, I am not sure which ones but some systems did not use mass air flow sensors.