These trucks were not made for people over 6’ to drive comfortably. You cannot move the seat farther back without running into the issues listed above. You can have a seat shop modify the seat back to make it thinner to gain you an inch or two but that’s about it. I feel your pain as I’m over 6’ also.
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)
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