I believe all those pieces come in the kit tclederman provided earlier
http://www.chevsofthe40s.com/images_product/large/3701900C.jpg

The spongy seals(top of pic in above link) in the kit go here

and the gaskets with the 6 punched holes will replace this

again the stuff in the kit is not like original, My truck is a 3100, Denny will have better info on the 3600.

Hopefully someone will chime in to confirm or correct

Good luck