I'm a little late to this thread, but I also purchased this kit. So far this install has gone okay. A couple things I learned though.
-Paper templates are next to worthless. It was much easier to cut off the high section of the front crossmember. Sit the new bracket down and then trace out what actually has to be cut out. The one for the rear was, ummm... off... I bet I ground down another 1/4-1/2 inches in spots to have a nice tight flush fit.
This is the final cuts before the frame went off to powder coat. I should start reassembling it next week.