i have an 87 formula 350 and i think i might have a ws6 so to find out if i do. id like to know where the rpo codes are and how i would read them.

 

I believe, and Okfoz will correct, that all Formulas had the WS6. So if you really do have a Formula, you should have the WS6.

Inside the center console is a black and white sticker that contains the RPO codes. Open the center console armrest, remove the cassette holder (if equipped), and on the inside wall you should see the black and white sticker with several 3 character RPO codes. Look for WS6.

If the sticker is not there, it was likely removed by a previous owner - which is common.

 

it is a true formula 350 and im the second owner so i can ask the first owner if it is....also i just read that all formulas are ws6 also so hopefully your right