55.2-59 Roll Pan and rear crossmember sill

[MALIBLOC]

I just bought a roll pan to install and when I mock it up , my rear sill just looks horrible and I know things can get out of hand with remodels but I do need now to replace the sill to have it look decent

Is the rear sill only held on my the bolts on the rear tailgate risers , taillights and the two bolts in the bed?

I just started unbolting everything then I said Id stop till i buy the sill today , that will give me a good idea of what I need to do.

Looks like someone bugger welded it in one picture , have you done that

roll pan seem like I may need to trim side flaps

Lastly is your roll pan supposed to be flush with the sill, any pictures will help

Im going to drill and bolt roll pan , so Im assuming doing everything first then bolting sill up , is that the way to go