Well if your gonna cut one up, don't be shy about it. This guy knows his way around a plasm acutter and TIG, thats for sure.
The addition of the extra inches on the body will make a huge difference in making it look correct. The problem with a Blazer turned truck is the cab looks too tall. By adding the extra inches in the body, the cab won't look chopped, it will look normal.
He pie cut the front fenders, so the are shorter at the front. This will give it a nice rake. It will help with the "chopped off" look that our trucks have when you run a new style front clip.
The only thing I see that doesn't look right is he did not get back of the truck cab roof high enough. If you look at the side view in the pics, the back of the roof appears lower than the front. If he doesn't fix that, the truck will look "bent" in the middle when it's done.
It's gonna be a killer ride regardless...
