request, photo-chop of sorts

hey ya' choppers,
i've been toying with the idea of cutting out the back of my truck cab (see the tape template). maybe a bit lower then the tape shows.
picture an anglia altered or somethin like that.
and chopping it 3 or 4 inches. it's channeled about 4inches already. the cab is kind of funky as it is, the doors are the narrower (coupe i think) ones. so not a primo truck cab in other words so i don't mind cutting it up a bit.
i don't know if it'll get a bed or not. hopefully though
any help or opinions would be great. and yes sarcasm if expected.
i can't wait!!!
tanks, c.b.

if these pics don't fly it let me know i'll take some more.

 

slice and dice man.......Looks like it would be cool to me...

 

With the rear right behind the cab like that, I second the motion to chop it.

 

Like this?

 

yeah like that!
thinking about making that piece replacable. just in case.

thanks for chopping.