I Need more caster, (lowered spindles) Options

[Optimusglen]

Hey all, I know that almost none of you would have any experience here, but I wanted to pick your brains.

As a refresher, the caster of the front end is the angle of the steering axis front-to-back. 0 degrees is straight up and down, +5 degrees has the top pointed back toward the windshield. Lower caster makes the car turn quicker, higher gives you straight line stability and makes steering inputs a little harder.

The factory slots in the strut towers give enough adjustment when the car suspension is all in-spec. But what if it's... purposefully out of spec?

Case in point, I have a 914 that I've gone the ORV route with. The spindles are dropped, effectively giving me more ground clearance and room for the larger tires. (215/75R15)

(IMG:http://www.914world.com/bbs2/uploads_offsite/live.staticflickr.com-19709-1779110937.1.jpg)

Now, of course, when one part of the geometry changes, that means everything changes. I did get an alignment when I finished putting it all together, and it's technically "in-spec" but it does feel a little squirrely at higher speeds, like on the highway or long backroads sweepers.

My thought is to give it more high-speed stability and give it more positive caster, but the struts are already at the full extent of the adjustment window up top. Not only that, but the portion that protrudes through the sheetmetal also is a limiting factor.

I'm hesitant to trim the sheetmetal. The slots would be simple enough, but the center hole for the strut has a lip bent up. If a portion of that is cut away, I imagine it could/would compromise strength?

This might be a similar issue many of you track racers have when trying to maximize camber, does anyone have any insight?