E85 + Boost, what plugs?

What spark plug would you guys recommend? I've read a few threads on the turbo forums and YB. Lots of folks recommend NGK and a non-projecting tip in a heat range between 7-10, 10 being the coldest. Anybody have a part # they've had good luck with? Mine is an iron headed 5.9 magnum, stock compression, E85 and about 8psi max. Also, what gap? I currently have an HEI ready-to-run setup and have my Autolite 3924s gapped pretty wide at ".045"
Thanks!