hanging new door in old metal door jamb/buck

So I've looked around quite a bit and I haven't seen anything that covers this.

I am looking to purchase a 1942 brick home that appears to have 1/2" metal door bucks on all exterior doors. At least one of the doors if not more needs replacement.

I've hung prehung doors to wood door jambs/bucks before, but what technique/fasteners does one use for hanging standard (e.g. from home depot) wood prehung doors to metal bucks?

Please note, I may be using the term of bucks and/or jambs incorrectly. The "rough" opening of the doorway is made of metal in this case, with the outsides of it seated firmly against the masonry of the house.

Thanks for any help,
Kirk

 

Not sure which applies:

If you're looking at an actual buck the trim door & frame will have been removed, and you will see holes or protruding studs on each side. The buck faces are flat. Tapcons can be used to affix the new prehung assembly to the buck. Give ample consideration to weather resistance before installation.


If this is a conventional wrap around metal jamb (this jamb has a stop & hinge pockets) a prehung door is not the answer. Hang a slab, but ensure you have the correct hinges before proceeding.

 

You will have to purchase door blanks, then mortise the hinges at the right place, leaving 1/8 - 1/4" at the top. Best way is to install the hinges in the metal frame, then measure from the top, less the small amount mentioned, to the top of each hinge, noting the exact measurement. It will probably be in the line of 7", 33" and 64", with a few fractions thrown in. Then transfer the profile of the hinge to the door and get a sharp chisel or mortising attachment for your router.

 

Right now, the one door I can see the metal buck on, has a door that's stuck in it, and I can't access the door from the other side currently. I'll have to wait to until I close on the house before I can remove that door to see what I've got in relation to the advice I've gotten.