WS7?
The WS7 hood mentioned above is actually a private company's "WS9" hood, with the wheel vents like on the Firehawk models. WS9 is also a performance/handling package from Pontiac(It's right next to the WS6 on my sticker). A WS7 F-body is just a fake WS6.
One way to tell, unless it too has been swapped, is the lower portion of the intake box. It's got a 3/4" high opening on standard LS1 cars, vs. 2" on SS/WS6 models.
I don't recall what the real WS7 RPO is related to (yes it is a real code) But I do know it has Nothing to do with Performance.
I beleive Suncoast Creations was the company that originally was selling WS7 emblems to go with their Raptor Hoods.
BTW
"GM being GM, did not expect the new WS6 to be as popular as it was. It seemed more people were ordering the WS6 package than they had planned which led to a shortage of 4-wheel disc brake axles. What to do? Do we continue to push orders back on the highly profitable Trans Ams because we don't have enough axles, and maybe build fewer than targeted. No, GM, once again being GM, created as new RPO, WS7 which was essentially the WS6 package without the 4-wheel disc brakes. Oddly enough, GM listed 4-Wheel Disc Brakes as a separate option J65."
2nd gen birds...
BTW
"GM being GM, did not expect the new WS6 to be as popular as it was. It seemed more people were ordering the WS6 package than they had planned which led to a shortage of 4-wheel disc brake axles. What to do? Do we continue to push orders back on the highly profitable Trans Ams because we don't have enough axles, and maybe build fewer than targeted. No, GM, once again being GM, created as new RPO, WS7 which was essentially the WS6 package without the 4-wheel disc brakes. Oddly enough, GM listed 4-Wheel Disc Brakes as a separate option J65."
2nd gen birds...

i was under the impession that most WS6 cars also had RPO WS9
The Best V8 Stories One Small Block at Time
WS9 is listed as the Formula Conversion Pkg but it just means the car has a V8. Therefore all Formula's and Trans Am's will have the WS9 RPO.
W66 Formula Merchandise Pkg and Y82 Trans Am Merchandise Pkg RPO's will be present to identify the Model.
After doing a little searching I retract my former statement about the WS7 not being a Performance Pkg Thanks for the info Joshiedoom (learn something new everyday) Basically what their saying is that Some `79 Birds had the same set up as the `78 WS6's which did not include 4 Wheel Disc's
Last edited by LS1W66; Mar 24, 2008 at 06:13 PM.

all ws6 have both ws rpo codes.
all trans am start out as a formula..then get the trans am package and if they are lucky then go to asc and get the ws6 rpo code.
And to tell you the truth I really don't know if they put build sheets in car anymore like they used to.
And to tell you the truth I really don't know if they put build sheets in car anymore like they used to.
Also, if it IS a WS7, and it was some option package (which it wasn't), then it would be in the paperwork, and the rule of the internet is "Pics, or you're lying"
So lets see some pics of the paperwork. 
