Interior Cage Headroom- 1st gen Pickup

[4inchToyotas]

I'm about to start my sliders and bumpers and was wondering what sort of headroom people were having, especially on the 1st gen pickups. I'm wanting to know so that I can be planning for exo cage or interior cage if it will be adequate.  I'm using the stock bucket seat right now, but plan to put in two Corbeau Bajas by the summer.

So, that's my question - how much headroom with what sort of tubing?

[MiniSimp]

I'm 6'4" and have the interior cage. Ripped out the headliner to get the cage up higher, and have no problems.
Just make it as tight as possible.

[Techtafab]

well I am 6'4'' and would not have a cage inside
exo cage the only way to go,no beating about the head and legs.