You want EFI and either a
Kenne Bell or
Whipple Twin Screw blower.
Don't get crazy with boost on bigger engines. The HP comes stunningly fast and the engine has max torque essentially from the hit. A 427 cubic inch engine with around 10 psi of boost will easily be in the 900 HP range if not higher.
The dangerous element here is the max torque from essentially idle. If you thought a 650 HP FE was difficult to control the blown variant will take your breath away. They get out of control much faster and more violently than a n/a alternative.
You can easily produce 700 to 800 HP out of a 302 cubic inch displacement. With the Twin Screw blower you do not need big displacement or RPM.
Ed