I'll take a look at the liners. I put an adjustable snubber on it and put the end very close to the floor. It still shakes a bit but isn't violent as with the stock snubber that's about 4 inches away from the floor. It does make sense that the liners would make it taller. I'm just thinking of buying a set of the super stock springs so I can increase that right height in the rear and get the stock shackles back on it. Though I only added an inch to the rear with the aftermarket ones.
I'll check out the inner liners. I did put an adjustable pinion snubber on and got the rubber nose very close to the floor. Unlike when I wedged the 2X4 I get some shake that way, just not violent as with the stock snubber.