Thanks fellas. We have to get the car repainted because whoever repainted it last, instead of using the correct paint code they just used what was close so it's a little darker than it's supposed to be. The cool thing is when my wife and I are both out cruising in our 'Birds...her Gunmetal Formula and my Gunmetal GTA,
Frankie over at GTASource was able to help me decipher some of the RPOs from the tag that weren't listed in the GTA RPOs. The car is also a two-tone delete optioned car making it a solid Gunmetal. As for finding the number of Formula 350s...it would be nice, but I'm just trying to find out how many 1990 Gunmetal Formulas were produced. That alone would be worth it.

Any help you can be would be great or helping steer me in the right direction to possibly find this information out. So far, the Formula Source hasn't been much help.