can u use a low hump cab as a 4x4?

[diggy]

I am rebuilding a 69 swb 4x4. The cab i have was an old 2x4 type with the low hump. Can i use this as it sits (knowing i have cut a hole for the tx case shifter) or do i have to cut out the entire hump and use a 4x4 high hump in it's place?

any help would be appreciated.

thanks