The two cylinder guide pins get screwed into the cylinder block
Front & Rear holes on the manifold side of the engine .
This holds the gasket in position so you can guide the cylinder head into place .
You can do a trial fit when the block & head are super clean .
Screw the guides thru the head gasket .
You could go to the hardware store & buy a couple of carriage bolts - 1/2 " - 13 x 5 or 6 inches
and cut the heads off to use as guides .