Gang - My oldest kid recently helped me narrow a 9" Ford housing (Okay - he did the whole thing himself, while I drank coffee and snapped a few photos - LOL). I've seen a few threads here about narrowing rear end housings, and it always looked like a major undertaking. I understand that someone doing this for a living would probably be able to justify a jig, etc,. But I thought this method was a pretty slick deal for a once-in-a-while thing. It only took about forty-five minutes, and everything came out straight as a string. Absolutely no warpage. I guess sometimes it pays not to over-think things. Once the pieces were cut to length, he used a scrap piece of angle and chain clamps to quickly get perfect alignment, then tacked it in four places as shown. Next, I used the edge of an abrasive wheel to "vee" the gaps between the spot welds to assure good weld penetration. Then came the really cool part. He simply tacked four scrap pieces across the gap to keep things steady. They may not look very heavy-duty, but there was really no place for the housing to move, and it worked like a charm. Once the main welds were made and had cooled down, I knocked the plates off and welded in the small remaining gaps. After that, it was just a matter of smoothing things off with a grinder. Like I said, quick and easy. We then inserted the axles, and clamped the ends together inside the empty housing (again using a piece of angle and the chain clamps) to assure they were in alignment. That made it easy to install the brake hats and rotors, then position the calipers over the rotors (with their mounting brackets bolted onto them in advance) and tack them in place on the housing. Again, everything came out square and straight with no hassle. The chain clamps were extra convenient, but most any type clamp would work. The key was using the chunk of angle for alignment.