Big horsepower 318 builds
I think it’ll take a bit of cam to do this and leave most guys screaming and crying on how un-streetable it is but will shout glorious things on a larger cubic inch engine that has the power band only 300-400 rpms lower as a starting point.
Upping the gear ratio and stall to meet the weaker torque output is what would be needed which is followed by the cries.....
I say make it a pump gas 93 limit with any head you feel that is needed.