need info for engine build,any thing will be taken as more knowlage the better
 

as of right now i am just gathering info but what i want to do with my 2003 P5 5spd is instead of turboing the **** outta it and then my motor will not last as long( i can easily put 10,000 KM a month while working 2 jobs) i want to over size every thing (piston head, crank, ect ect) plus then i will be more of a sleeper(or so i think) i would just like to know how much it would cost to over size and all that stuff to a block then swap it, and how much HP i would gain over stock and compaired to turbo/super charged
thank you very much !