well i havent done any of these mods yet but i do have my parts sent away to get some if it done, and iv been around long ehough to know some stuff. i would say get your crank welded now before you decied to go with any more hp, also i would get your cylineders bored just so you know the size and what size of pistons to get makes things easyer and its nice to know they arnt out of round at all i think. also for the porting iv never heard anything about there work but porting is a very good way to make more hp. its a noticable difference apperantly from what iv been told. oh yeah and about your head being milled if your going to do that your upping your compression and therefore i would get the crank weled since you have it half way apart. just my .02 cents