We all know the story.... 6'3", love the short wheelbase CJ-5, leg room sux.
I found some pix of a similar modification online, and brought it to a local body shop.
Long story short... loving life!
Cheap *** aftermarket seats (Rugged Ridge or something like that), early YJ flip forward risers, with late YJ sliders. I have more leg room than with my late CJ7... I could even drop my tilt steering (IdidIT) from full up position!.
To give you an idea of clearance, I am running 32" tire with 2.5" lift springs.