Lets build a new engine.

Garrett Ellison said
Constant use over the 550 hp mark is generally regarded as the tipping point for a regular production 360 block. What your talking about building would be capable of exceeding that number by a large amount.

A roots blower makes power differently than any other power adder. It is significantly harder on blocks and rods than anything else.

With say, 500 HP and 12 pounds of boost the block will have a very short life span. Miss on the tune up and block life gets reduced exponentially.