[pist0lpete]

On a 408 with twin turbos 1000-1200 shouldn't be a problem as long as the motor is build fairly stout and I assume it is. You would be pushing something like an LS6 intake at those power levels but it certainly could be done there is a guy with a 71 chevelle around here making 1000 with an LS1 347 cubes and an ls6 intake. The advantage of a sheet metal intake over the GMPP piece would mainly be equal runner length and being able to design it for your specific setup (plenum volume runner length etc.) which is a definite advantage. Once again it won't be absolutely necessary to your build but it will affect the torque curve and and where power comes in at I would imagine. Perhaps your engine builder could shed a bit more light on this. On a side note, I agree the TPIS as well as the beck and I believe Nelson Racing Engines has one out now all are awesome looking intakes. If you do decide to do the intake elbow consider going with the wilson cast elbow as some people have trouble with the fabricated ones coming apart. Also, Camcojb makes a good point about maxing out the maf that I forgot to mention which i am sure you will have maxxed it out before you achieve your power goals.