hey guys, prett new here to the forum and looking at a GM sportsman block P/N 12480157 for a very reasonable price. it's brand new, never been machined and am wondering if it will hold up to the power i'm hoping to make. its a 350 main w/ nodular iron 4 bolt splayed caps and 400 bore size. i have a rolled set of 18 degree brodix pontiac heads that flow right around 350 cfm's at .700" and am looking at 250-300hp worth of nitrous. looking to make 675hp on motor (w/ E85) and the extra 250-300 on the gun. think i have a shot at keeping it together? thanks for you're help.