Lower Wheelhouse Replacement Part, Is it meant to be single layer, or double? Options

[Gudhjem]

I’m working on repairing the area below the Hell Hole – basically the bottom of the passenger long around and behind the jack post.

My plan is to preserve the double-wall original aspect, so I’ve been taking pains weld new metal onto the inner C-shaped long pieces before I repair the outer pieces that sit over them. TIG welding on slightly pitted 20ga is challenging, but I’m managing. I’d rather not go the single-wall replacement route that the RD/AA inner long piece for the engine compartment is designed to do (the one with the corrugated ribbing that shows after install).

As part of this, I need to replace the metal around the jackpost on the inner wall. I’d like to be able to use this piece from RD:



Can anyone tell me if the RD piece is meant to go inside of the outer long (like the original configuration) or if this is meant to be a single-layer piece, with nothing over it? I'm guessing it's meant to be single, since I think I see a flange on it, and the inner "C" channel pieces don't have that. I’ll have to do some pretty tough fabricating to get the jack post hole right...

[Gudhjem]

Thanks for the reply Pete.

The reason I will probably separate the two pieces is that my outer piece appears to be in decent shape, while the inner peice has rust issues in the bottom of it and around the jack post.

I'm trying to keep as much of the original metal as possible, mostly because I want to reduce the chance that I throw something out of alignment or twist the frame. I'm doing this without a jig, and that's my biggest concern. It would be easier and less work if I just cut out entire panels and replaced them with new ones, but I'm not sure I can keep the car straight if I did that. So I'm not planning to replace my part with the replacement part entirely, just cut away until I get good metal, and then cuts pieces out of the replacement part as needed.

I'm happy to get both pieces though, since there probably are some parts of the outer that I will replace, like around the jack post. Per my exchange with Lucy, my understanding is the double piece is what is on its way to me.

I suppose most who buy that part are replacing the entire original piece, or are at least replacing both layers where they replace it, so it makes sense you've spot welded it. I'm just trying too limit cutting out that much, at least at one time. We'll see, I may end up using more than I think.

--Steve