Okay, first, I have to wave the BS flag about the 2-engine Tiburon. That just makes no sense. A car with an engine in the trunk would be...an engineering nightmare.
About the guys who wanted the GT-40, that's actually one of 2 favorite cars, (along with the Jaguar XJ-220), but it's better suited to road/track racing. (Mid-engine, wide, squat). For the 1/4 mile I would want something along these lines:
1966 Shelby 427SC. Nitroused, Twin Turbo 427 Cammer engine. (1500HP?) Then, remove anything that isn't absolutely necessary.