From Edelbrock website

HEAD BOLTS or STUDS: High quality head studs or head
bolts with hardened washers must be used to prevent
galling of the aluminum bolt bosses. Edelbrock Head Bolt Kit
#8555 includes two longer-than-stock bolts which must be
used with these cylinder heads. If you use any other head
bolts, you must use the two head bolts and washers supplied
with these heads in position #5 in Fig. 1. This position will
not accept stock length head bolts.

That said, I think the 2 bolts were supplied with mine when I bought them, but that was years ago.