Thanks Mark and Tony, I know they wont give more power but I am trying to build the engine as it was intended so this is something I was interested in.
For the main bearings I experienced some problems. As the studs are slightly thicker than std the holes in the mainbearing caps have to be drilled somewhat larger. There are some pictures in a post.
Thanks Jeroen, yes, thats the thread I have been following and was referring to.
I will go ARP for the reasons that you mentioned, not the head though, I don't think they do them for a Sprint head anyway.
Can I double check the ARP part numbers with you?
Rods - 206-6006
Block studs - 206-5404