I have built the engine so far and fit the body to the chassis and rear facia, nothing beyond that. So far, so good on the fit. It took some tweaking of the rear facia to get it to fit tight to the body, but not difficult. Just had to bend the sides of it inward a bit.
I'm not sure when I'll get back to it. It was a break from another major project. Working on a different major project now. Darn it, I want to build em all! Never that much hobby time.