Jimmy, that's the same setup I used to run, tires and all - My tires were Continentals back then, and the car is an IRS rear. I got my spacer/adapters from Pelican Parts but they were made to my specs. I also have 3/4" sway bars front and rear and a set of Konis. The few times I've had it out on a track (Roebling Road and Hutchinson Island near Savannah and a bunch of tracks in New England) it handled like a banshee. I could not break it loose. The Cobra guys had lots more power, but they couldn't handle the turns as well.
I know you've got a really nice handling Speedster. Enjoy it!