With that type of failure, "metal" might not be everywhere, but would most probably be in the oil pump, oil pickup, and oil FILTER. Unless something got into an intake port OR the piston and valve met each other (not sure that would be possible if the valve spring on that cylinder was intact and not broken). Which should be verified when the head comes off. So, some variables there.
If that's all that's wrong, then a flush out of the oil pan, pickup, and inspection of the oil pump's guts should confirm just what the condition of other areas might be. AND that might be all that needs to be done. Past that, it gets into the "while we're in there" . . . . and related $$$$$ situation. Plus, the needed cam/lifters/timing chain items.
For this level of repair, it might be good to have somebody that has been inside of and had successfully done a Chrysler B/RB engine, but NOT always necessary. Considering some of the basic design similarities with the Chrysler B/RB and the small block Chevy engines. BTAIM
UNLESS you want a full-blown engine rebuild, remember that "least is usually the best", generally. BUT consider what the investigation reveals BEFORE un-needed things might be done.
Some might consider anything less than a full rebuild "a patch job", but it's really not. Replacing bolt-on/bolt-in items is relying upon basic mechanical skills. Machine work is in another category.
If the factory "line hone" was good, the main bearing wear patterns will show that. The cylinder bore size will always have some wear on it, as will the pistons. so accurately measuring those diameters and then doing the match for "clearance" and how it relates to the factory specs can be important. From what I saw with my machine shop operative, it will take a .030" overbore to get to "clean metal" and then honing for the correct cross-hatch pattern on the cylinder walls.
If the crank has some wear patterns, a simple polish might clean it up nicely, without having to turn it down. Always Plastigage-ing the bearings for clearance, too.
BUT you can talk to people on the phone and only get frustrated, especially if you aren't really sure what is needed. Find a local, competent mechanic to pull the head off first, then go from there. Do price a cam/lifter/timing chain replacement. Plus the oil pan/oil pump removal. That might give you a more realistic idea of the costs. Figure in some tow bills, too.
Just some thoughts,
CBODY67