ok guys here is the low down, i done the Pi swap to my 98 GT and no mateer where you go if you can get the kit for about $1300 then that pretty good, but there are a few things to add to the PI heads. buy a set of APR head studs($220) cause eventually you'll prolly pull the heads and port them, with the APR studs you never have to buy heads studs again. also buy Kometic heads gaskets they are bad ass, something about the gaskets they give you and the 98 block they dont fit exactly right and have to be trimmed a lil bit but the Kometic gaskets are good to like 900Hp. i went from about 200rwhp to 257.3rwhp with only the PI swap. also if your wanting to run NOS or a supercharger then you will have to buy dish pistons to bring down the compression, but if this is the only mod then all this shit i worte berfore is completely worthless. i think the compression goes to like 11.5:1 w/o the dish pistons thats ahy i had to put 10cc dish in mine.