Got the 12" (Competition Engineering 2565). When I installed them I put them on the very bottom adjustment holes for the mounts and fabbed the upper mount. That will give me a full 4" of adjustment when I get all the weight of the car on them. Right now with the weight of the car on them the 28 X 12.5's sit in the wells and the top of the fender well covers about 1" of the top of the tire. Should be perfect when all done and adjusted out.
Wow, 12 inch springs was what I chose also. I got cheap and didn't order their shocks though. I was going to use some Pro Shock's that I had laying around from my stock car days but now I'm not sure if they are any good or not. Would you happen to have the part number for the shock that goes with your 12 inch springs? I've decided to purchase them from C-E afterall. Thanks