You may want to contact Randy Hunter at Hunter's Cobra
http://www.hunterscobrakits.homestead.com/index.html
He is located in Ocala, Florida
I am 6'6" & weigh i8n at 250. Randy was able to drop the floor pans and widen the footbox. He is currently producing at 90', 94" & 96" wheelbase.
It is a family business and they are great to deal with.
Regards
Bob