Shooting for 200hp with a silvertop should be easily possible with stand alone plus moving over to map and running low boost. I have seen some epic silvertop projects, usually it is putting 4agze internals in it and putting on a turbo or a 7afe shortblock with the silvertop head and a set of H beam rods + big turbo
. The head flows very well and responds well to most modifications especially intake/exhaust mods. I want to get my silvertop swap underway but I need an ecu first.