Brand of what, internals, or twin turbos....im assuming internals. I wouldnt necessarily bore it out but hone out the cylinders a bit to 4.07" and add a 4.00" stroker crank. Shoot for about 416 - 418 cubes. Callies Compstar crank and callies h-beam/I beam rods and Wiseco or Diamond forged pistons. Think about coating the pistons with ceramic tops for a little extra strength. This will be a start
What boost are you looking at and what is your final HP goal?
ARP hardware and ACL coated bearing etc. etc. etc