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I'm wondering if any one here has chopped a 4-door P15, and happens to still have a piece of the B pillar laying around. Don't get wired on me - I'm not thinking of chopping my car. I would like to know if my rough drawing here accurately represents how the B Pillar is constructed. I've done a rough drawing here (square corners), but the dimensions are pretty close, I think. The piece drawn separately at the top is the piece that is covered by the upholstery-trim piece in the inside of the car. It fits into the actual B pillar, and appears to be welded at fairly long intervals along the edges. The offsets are where the tar-impregnated tack strips sit. This inside piece has tabs at intervals along its length, which are bent over to hold the tack strips in place. Here's my question or concern. It appears to me that this inset piece is not overly secure inside the main part of the B pillar, and that if a shoulder belt is fastened to it, it would not withstand much force, and just be ripped out of the B pillar. It is only intended to hold the upholstery trim and the wind-lacing in place. I'm thinking that in order for a shoulder belt attachment point to really do any good, it needs to be fastened to the main part of the B pillar, not just to this filler strip. What I'm considering is to make a U shaped piece which would fit inside the main channel of the B pillar, and then be secured in place with counter sink screws through the sides of the B pillar. True, these screws would show when the doors were opened, but if that were a problem, it could also be plug welded, then that area cleaned up for repainting. I would put in a channel that is around 7" long, because I plan to use the belt height adjusters out of the 93 Chrysler Town & Country I scrapped out. The seat belt height adjustment mechanism would be bolted through the filler strip and into weld nuts on the inside of the added channel piece. (I am long in the torso, and so I need the shoulder belts considerably higher than my wife, or others in my family who might be driving or riding in the front seat.)