I'm 6'5" 250ish and I never really had a problem in them. Although I have driven stealths and other smaller cars and got used to it. Although I am using after market buckets in my 70, so I'll move them back for more leg room.

68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram