Phat, I was thinking about narrowing my "A" arms too. Buy what I figured 1.50 inch would only be about an 8% change in overall length and all the points you made would be altered so little it wouldn't matter. It wouldn't be the same geometry that GM spent all that money developing, but in the real world little would change. The bump steer was my biggest concern but being where they pivot and the fact that both arm and tie rod would be shortened it would work.
But, as the old saying goes, when you modify one thing.........it leads to many more.
That Michael Thomas chross member was flat! It had ZERO anti dive designed into it. Plus the upper shock mount looked like a piece of exhaust pipe with a washer welded on top!
