I am in the process of fitting a Shell Valley body right now. I bought a tub, hood, fenders, and windshield frame all gel-coated in October 2013.
I have test-fit the hood and fenders to my stock steel grille and SV tub and all seems well. I have had the windshield frame out of the box,but have not test fit it to the tub yet.
I am documenting the major steps I'm taking to fit the body onto my chassis, and will post them up when I am done. I searched long and hard for a good write up on this topic, but never found a really good one other than EXPOSED here on JF. I suggest you read thru it. I hope to be driving my CJ7 by the fourth of July and then every available second after that until winter shows up again. I plan to do a good write-up next winter.
I drove out to SV in Nebraska to meet with Dana when I was shopping for bodies. I spent weeks researching and brought along a list of questions. Dana was very accommodating and I got the full tour while I was there. I asked for some small samples of gel-coat colors and for a small piece of the Thermolite core board that they use.
I talked to the guys out in the production area, they were buffing out a red tub at the time and getting ready to crate it up for drop shipping. I was down on my knees sighting down the side of the tub and one of the guys asked me if I wanted a light. He went to the bench and brought over a trouble light and let me to it. They gave the impression that they are proud of what they do.
I can't give an opinion on SV vs. some other brand as I was only able to physically see Shell Valley tubs before I bought. I also won't comment on glass vs. steel vs. aluminum vs. lego blocks vs. whatever as there is plenty of info on that subject already. Every option has pros and cons, but, your decision has to be based on your abilities and expectations. I did my research, then I pulled the trigger. Now I'm gettin' it done , so I can DRIVE IT
Hope this helps, pm me if you'd like. MIXUP