My gen 2 3sgte has been built with around this sort of power in mind .. Mind you though its at early stages + will require cams better fuelling + a decent turbo to obtain over 400 HP ..
Would be curious to see how much this motor went for as i know mine wasnt all that expensive ( considering the componentry that went into it ) to rebuild fromm scratch including a tonne of modifications to handle power ..
and wholley agree on the ct26 here - thats the biggest holdback for mine atm .. you need better than that