When I turboed a motor. I sent a core to Comp to have custom reground. I told them what i had and we figured something out together. I went with lower lift and high duration (compared to a H.O. naturally aspirated). It didn't cost too much. I don't know what a slant turbo would need off hand. Goto Slant6.org.

There are lots of turboed members there, I know Slantzilla is a member there as well.