What is the thickness of the lower front spacer on your current front? I think I had heard that the guys at Cornfed had a few different early variations to the Poly spacers and that some re-used the factory rubber isolator. Yours may have been one of those, you might try contacting Burtman...
So let me get this straight, from the posts I've read about your lift, you initially had a 2" front and 1" rear lift then switched it out to Cornfed's 3" and 2" rear? Is that correct? Was the first set of front spacers a Poly spacer like other comments I've seen on here, and also is your...