What do I need to do to build a 1000hp turbo small block

Good luck OP. You will need it. We have an avenger show up at the track occasionally with a crazy HP small block mopar and I would not want that headache in my life. Too many other options in life for that kind of power that won't require a second mortgage or psychotherapy.

However if you want to taste this forbidden fruit look up Bill Harris on FB. He is out of Maryland and will probably give you the info needed or atleast a starting point...

Good luck,
JW