I hear you on that one. LOL
I'm "only" 6'3'' and I had a head room issue when sitting up straight. I had my car prepped for the track but then I realized I couldn't really drive with a helmet on. hehe
So I bought a pair of Recaro's and mounted them as low as possible. There is plenty of room now, even for my friend who stands at 6'9'' tall. You could also fit the del Sol seats in there, but it's going to take some customizing. Those would sit even lower. I had a del Sol too
'01 S2000
'95 Prelude VTEC
'94 Civic VX