I just did this swap on an 89 Blaster. I found someone with a bent 03-06 frame and bought the headlight mount bracket and front plastic mount brackets from them. Then I welded up a jig off of my 05 frame. Then I used the jig to locate the 03-06 brackets on the 89 frame and welded them up. Without a jig, it's going to be very difficult to get the brackets in exactly the right locations.