Strut rub is not totally a function of alignment. It is also a function of excess movement and migration of the strut bushings. If the strut bushing cannot support the strut shaft, then the shaft can go in-out in respect to the engine, which will also cause some sidewall flux. if the tire is going in and the strut is going out, then the strut can be kissed by the tire. I have documented a strut rub issue with a GTO with at least 1/2 inch clearance and a severally worn strut bushing. I also strongly recommend when trying to stabilize the front end, to also eliminate the garbage radius rod busings. They allow a very serious amount of movement with caster and toe.
Now for the question on spring spacer, Pedders makes 2 styles:
EP386/10 GTO Urethane Coil Spring Insulator. 10 to 13mm increase $19.80
EP386/6 GTO Urethane Coil Spring Insulator. 6 to 9mm increase $16.12
You can put one under the top and bottom rubber insolators. Therefore 2 per spring. The 6mm spacer will change ride height from 6 to 9mm, and the 10mm spacer will change the height between 10-13mm.
Pedders does not make a spring spacer for the fronts.
As a word of caution, many have used these spacers to resolve OE spring sag and in fact work well to return the rears to proper desired heightl However they do not repair the serious loss in OE spring rates as a result of the shipping damage
Mike (aka Pedders Peddler) ...
Ok my friend I will take your word for it that the bushings are **** ... most likely you know what you are talking about and not just trying to make a buck off GMs crappy enginering ... then again ... let's face it that is exactly what you are doing .. nothing wrong with that ...
In my book these cars look like the old Grand AMs .. the Grand AMs in fact looked a lot sexier than the the Pontiac Goat ... I mean come on park one next to a Vette your car looks like a turd next to a Viper or Vette but it is as fast or faster with a few mods ...
This is how I plan to handle the situation. I purchased Pedders shocks and these springs .
Pedders GTO SR Rear Coil Drag
5/16" Raise 2589 and
Pedders GTO SR Front Coil HIGH
Raise 1" Pedders 7120
I got all of it at a great price ... in Florida ... much lower than old Mikey would have charged me. I am sure !!! Shop around folks ...
My car runs fine with the spring spacers .. but they are a band aids.
I bought some beefy 285-30-18 G-Force drag radials from a highschool kid off Craigs List .. new pair for $135 .. he paid $400 for them but I guess he needed the $$ more ...
When I burn the rubber off my back tires I will have the above springs installed and change out the shocks. That will give me one inch hight in the front 5/16" Raise in the back. I plan to run 245-40s-18 in the front. I want my back end to sit slightly lower with the big muscle car rubber sticking out letting the world know I am NOT driving an econo-car .... fk Obama and Gore global warming is a myth !!!
Since Mikey tells me the GM bushings are all **** I will take his word for it .. once Mr. $$ Green $$ shows up I may change them out. For now the factory bushings will have to do .. and I think they will be ok for the next 50,000 miles???
I tell you ... I live in Miami and I have seen only a few GTOs ... I saw one ... with the lowered springs ... it really looked like a mushroom ... cheap little rice burning econo box. These cars have a bad case of the uglies ... lowering them just makes them uglier ... If you want respect you have to put some big rubber in the back and loud Magna Flow exhaust ... hearders are always a plus. Oh don't tell the eco-friendly nut jobs ... but I go cat-less .. and only use my GTO off road