Lou: Shaft mounterd rockers are nice, BUT really only provide a benefit in valve train stability (why they were designed in the first place) if you are consistantly RPMing the engine hard. A very good alternative is to use ARP 7/16 rocker studs and their design of locks.
http://http://www.arp-bolts.com/Catalog/Catalog.html
If you are using aluminum heads and 91-93 Octane fuel you should be ok on your compression, although it is not a real radical cam. There are some head gaskets that are a little thicker than others and can reduce or raise the compression a small amount.