Make sure to be careful with the screws holding hte timing plate on, they can be a bitch to get off. I would recommend putting the screwdriver on the screw and hitting it with a hammer to break them loose some just in case, it's a PITA when they strip out.
J/c but what kind of porting are you planning on having done? I've got some strong dune ported stock cyl's I'm probably going to be selling early this summer. Pm me if ur interested