I definitely wouldn't go with a stock geometry setup (Yes, some of them are).
Griggs has been proven on the track... they move the control arms 2" up, so the lca's aren't angled (when it's lowered)... this moves the front roll centre UP, which is important on this front heavy car with crappy suspension.
They move the LCA's forward... gives you more caster (better steering feel, less wandering, and less camber loss in the corner)... it also improves the weight distribution (slightly).
They move the rack 1/2" back, to improve ackerman, and reduce bump steer.
Granatelli/ground pounder did the same... and their's is cheaper...
MM is supposedly releasing one soon... Similar specs, but it's not any lighter than the stock k-member, but you can use the stock lca's and springs (or so I've heard).
Another alternative is
www.ajeracing.com dropped spindles with struts & cc plates. Less work... similar cost & benefits.
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'89.5 5L LX, hatch, Medium Canyon Red, 155K Km (No winters), 5sp, 3.08, GT interior, a/c, Alpine CD, K/N, Crane PS91, Walbro 190 LPH, March Pulleys, Mr. Gasket 180 therm (HP balanced), 3 core rad, MarkVIII fan, Variflow controller, Polygraphite front bushings, FMS-5300B springs, 6 KYB's, 73mm Calipers, Maximum Motorsport 4pt chassis brace, Western Motorsport Racing's Sub-frame connectors. Re-ringed bottom end, conv. motor mounts, melling oil pump, FMS-C50 waterpump, GT40P heads (blended, polli