What is a good combo for turning high rpm?

We went the other way with the engine in Tim's car. It is a 427 inch small block with a 4.125 stroke. It has peak power at 5800 rpm so the power is made in a different part of the curve. I can't see building a 8000 rpm engine for $7000 unless you already had all the parts on hand. That 427 engine cost about $18,000 to build and that was with me doing a lot of the machine work at no cost. Had it been built by an engine shop it would've cost about $20,000.