my ( first build) 27 chevy is chopped 6" and channeled 4"
i am 5.9 140 lbs.
and it is TIGHT in that cab.
i am having to put the gas pedal on the firewall above the tranny hump.
14" steering wheel.
thinnest/smallest seats i could find.
i dont think my fiance is going to be able to drive it. (big boobs)
in hindsight i would have made the rear of the cab longer.
but on the good side.
at 49 years old i aint gonna grow any more.

when i started trying out seats i realized just how tiny that damn truck is.
if i was any bigger.
i'd have to sell it.
my next build will be built around a normal sized human.
live and learn.