Some where in the Torchie archives I might. Ill have to look.
The doors on the 60 Chevy didn't sag either but I was going to do some adjustment as the DS door gaps were bad when I found it. You will need a good strong light and have to get down on the ground to really see into that lower pocket.
As I recall I pulled off the door to get to the lower portion of the side of the cowl. I measured in to the pocket and then transferd that measurement to the out side cowl. I then cut out a square piece of the cowl out allowing me to see where the hinge actually bolted to the inner pocket structure.
Of course this is all based on your Buick door hinge being like the Chevy door hinge.
As far as the X frame goes. Ask any questions you have . Lots of members with good advice on this site.
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Torchie
Yeah my luck it's probably the same as the Chevy lol my car is quite rusty in that general area unfortunately.