Ex manifold bolts

IIRC, the outside bolts are actually studs. Not necessarily required, but it lets you hang the manifold and lets the job go much easier.
Special stampings? I am guessing that you are asking whether to use grade 5 or grade 8 hardware... yes. Also, use some high temp (copper) anti seize on the threads.
Those studs on the ends, you probably won't find them in any grade 5 or 8.
C