You didn't post any pics of the seat in its final location. I hope it's over far enough against the tunnel and at the right angle so you won't have interference from the body at the top corner by the door latch. It's a tight fit. I personally recommend not locating the seats until the body is in place. I did my Mk4 go-kart with the seats loose. Safety police wouldn't be happy, but I just putted up and down a side street in my sub and never went over 20 mph.