Regarding ingternals I don't think there is anything you can do for $1,000 if you're not a builder yourself...?? Parts alone to build a forged S197 block is double that. Then add build/balancing, misc. parts (main, head bolts/studs, etc.) again adding up to a couple of grand...
If I had the time and the money I'd go with the Powerhouse set up but upgrade the Turbo to a 76 mm. unit!

As most of you know I have the built motor, heads and most of the drivtrain upgrades but would need to redo my exhaust, OR shorties probably, or custom fab the Kooks to turn fwd at the colectors...??