Well, I have finally gotten the car running right...I had to remove the MBC, because for some reason, the bigger turbo wasn't liking it, and it was caused spiking, surging, and lag problems...I also bumped the boost up to 10psi by shimming the wastegate (3 shims).
I must say, this is the fastest the Supra has ever been! It's a TON of fun to drive, and play with STi's on the freeway! :biglaugh: Can't wait to see the numbers it makes in Vegas!