[SCOTI]

While 'low profile' tires do exaggerate the feel/quality of the road surface vs taller tires, there are many Z28's/Mustang GT's/Vettes/BMW's out there w/short sidewalls that ride pretty decent. I'm betting it's a travel related issue that compounds the issues of the shorter sidewall.

Figure out the bump-stop situation first (front & rear). You need to know how much travel you have & what will interfere first. Bump-stops can be trimmed or replaced w/shorter ones but doing so will require the stop to be stiffer so it won't absorb impacts like a taller OE unit might.

Once you know travel dimensions, you can start working through items toward a solution w/o just throwing money @ it & hoping "that was it". There is no magic answer w/o doing some investigation on your end.