One for the rich small block guys.

I agree but we're talking $60,000, kind of something like those guys did when they threw NASCAR / p7 or greater in back in the 90's.
It's sad 15,000 grand can't snatch a 1000 na hp, really sad. We can just turbo the old ****, 440 for instance , and be ahead money wise... and then buy $$$$ Billet main shafts and planetary..and front drums and on n on n on... like you would do anyways with the 60k motor.
Shouldn't cost over 15-20k .. but really the $$$$ is only there to separate classes of enthusiasts... just like the 20k watch, the designer shirt that costs 200 bucks.. and some other **** I read heard the other day.
But 15 grand CAN buy (or build ) 1000 hp, pretty easily, if you are willing to use a power adder.Several different new motors and a few old ones can make 1000hp and live.... as long as the power adder doesn't push the crank out the bottom. Tuning, tuning, tuning!
Frankly, I'm old. I only need about 600 crank hp to be where I wanna be. That can be done N/A pretty easily nowadays.