[T.L.]

I'm 6ft 4" and have a Harrison cobra with the extra 4" in there. Fit in it nicely. I also have a dropped floor to assist, ie the floor panels are bolted onto the bottom of the chassis rail. That gives me an extra 2" in headroom.

I also have size 13 shoes and the foot well is also something to consider. Some engines have a bigger area around the foot well so you loose some space.