Engine Block Studs How Domed??

[phonconn]

I am trying to build up a show engine. Jan 29 engine studs are at question. I have several different varieties of domed studs. One style is almost pointed, one is almost flat, another slightly domed with machining circles much like on the lug nuts and a none pointed nipple in the center, and then some that are slightly domed with no machining marks. What is most correct for a blue ribbon restoration? Thanks!! Dan
PS. Back in the Model A parts business again.