A 400" big bore, short stroke, 10,000RPM big block is a pretty exotic piece for most people reading this.
A single 4 and correctly sized heads won't need 10k. 8500-8800 is a pedestrian RPM today and that should be all it would need. Also, cam timing would be relatively short. That's also a bonus. The better the head, the less timing you need to get the same RPM.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
