The 4 link is mainly for handling the increase in power. The springs wind up too much, and I didn't like the clunking of the tramp-rods I used on my old setup. I also need more space for mufflers, because I don't want it to be a loud beast. With the leaf springs removed, I can put mufflers behind the axle. I'm thinking of putting 2 mufflers on the back, and using a crossover pipe to the other outlet. By having 2 mufflers at the back, I'll be able to use more restrictive (quieter) ones behind the axle without loosing the power.
I got the sedan as a rolling shell in primer (which I've completely stripped), But as you see yes it had a chrome strip along the body like the coupes. I filled the holes using brass shim and a large soldering iron. It was a lot of frustrating work. It's a better solution than filler or epoxy glue. I had to fill almost 20 holes, the front guards are taiwan replacements so they didn't have the holes.
I'm thinking of maybe putting replica GX pinstriping, but I'm not sure on that. The colour is kind of secret, You'll have to wait until it's finished

I've got no problems with you ripping some ideas. Although a lot of pain is experienced daily in deciding what direction to go in regards to the rebuild. It's harder than my 9 to 5 regular job.
Chris.