I have an opportunity to buy a complete FI system(very rare around here)...but the car has been sitting out in the open environment without a Hood for the last year...would the sensors still be able to work even though they have been covered in snow for months and spring rains

Only one way to know. But most of it should still work. Might want to remove the throttle body and clean it out first before installing it. Don't forget to get the airbox w/ MAF, distributor and coil, the whole harness(or at least the whole engine bay part), the ECU(with wires), and the Fuel Pump.

 

If it's an 89 2wd with Automatic Seatbelts, Make sure to get the "rev sensor" box. It's mounted near the ECU, Black, 6 wires. Or you can try to eliminate it in the harness when you do the swap.

check for corrossion inside all of the connectors that plug into the sensors. if any wiring at the connectors appears compromised at all, i'd pull it back a bit and make sure the wiring looks good and tape it or shrink tube it to seal it back up. if you have one bad component, it won't be hard to replace it, so i wouldn't sweat it unless the wiring looks really, really bad. while the manifold is off it wouldnt' be that hard to test all the wiring either if you wanted to. pay attention to plastic connectors and rubber "seals" at the base of connectors, they are likely to be brittle and dry rotted. fix those.

Thankyou both for the info..now I am encouraged to go out and strip it...it is a Canadian car so there will be no issues with the seat belts..I was looking at these FI components as spares for my 86 conversion, which would give me now the ability to travel anywhere with the car...I hate being at the mercy of other people when something goes wrong with the car, especially when the part is very hard to replace(find)