Negative Wedge Arms/Shelby (Arning) drop

The Arning drop is 1", the GW drop is 1-3/8, the negative wedge drop is 1-3/4. The GW arms are shorter than than stock.

Don't drill another set of hole in your towers.

What is your reasoning for a change? Better camber gain or stonger arms? Or are your stock arms trashed? Track car or street? You may want to look at the new Street or Track arms. Shorter than stock for more camber gain and you can use the holes you already have. + cheaper than GW or TCP.

Street or Track Tubular Upper Roller Control Arms

on the spike tv show horsepower they built a 68 fastback from scratch with global west suspension and i believe they did the standard shelby 1" drop.

Exceeding 1" gets into problems you don't need in street driving. 1 3/8" may be groovy on the track, but not for street driving.

I have the same setup: shelby drop with GW a-arms
for some reason this made the front sit much higher, but im using the shelby drop since i didnt want a weak spot from patches and redrills.

also, my bolts are too long, and need to be cut down so they dont hit the headers. i currently have the bolts at the stock GW length, but have their spacer there. the problem is that it creates too much camber, and im actually +.5* rather than negative camber. this fall i will take out the a-arms and cut down the bolt length, then use thinner spacers to get the a-arm closer to the body frame for negative camber.

as for the ride height, i cut down my 620 springs. cant remember if they were originally lowering springs or just 620s, but they sit higher from the wacky geometry. be prepared to do some cutting and driving around the block to setle the front end. make sure its at the right height before going to the alignment shop.

another thing is that using an adjustable strut rod like the ones from GW or Rosehill Performance (better price) is that it helps the alignment shop dial in settings. the downside is that adjustable strut rods make the control arm bushing bind, so i put in control arms with a spherical bearing at the frame pivot (open tracker control arms with his bottom renforcement plate welded in).