Weird hardware with new 440 six pack intake

Just got a new edelbrock six pack intake and there is some strange hardware in the box. The parts are listed in the manual but no other mention of what its for. Anyone have any idea?
I don't recall ever getting any hardware with any intake manifold before.

FP1 shoulder studs
F262 shoulder studs
moveable stops
capscrews, washers and cotter pins.