In some other states when you swap engines and tag a car, you can tag it as a street rod or historic,and you can use whatever induction or engine...
on the f.i. intake there are several that come to mind that will support 400hp. the EDELBROCK PERFORMER RPM,THE VICTOR JR,THE TRICK FLOW TRACKHEAT AND R SERIES,THE HOLLEY SYSTEM MAX2,the old SALEEN/VORTEC INTAKE..these will all support 400hp...with the right lb injectors and cylinder head cfm flow.