The SVT does not have this "dog bone" style linkage. The SVT cable attaches to linkage directly mounted on the throttle plate bar. On your non SVT TB, there should be a little bit of movement on the dog bone, but not a whole lot like you're describing. Short of fabbing up your own dog bone, I'd say you're SOL on adjusting that TB if it really is shot like you're saying.
Brad Noon
'99 SE MTX
3 point oh my God H.O. 179HP/178TQ
BNMotorsports Floormats, powder coating, TB optimizing, Gutted cats, etc
BNMotorsports is now the preferred distributor of Contour/SVT/Mystique Indiglo style gauges!!!bnmotorsports@msn.com