[Sirrotica]

Since the parts inside a Q Jet carb are made of plastic as well as many parts inside fuel tanks, I see no reason why there would be any concern over using it as an intake manifold. Many carb spacers sold by the performance aftermarket are also made from polymers. LS engines already use a plastic intake, but it's running dry because the fuel is injected downstream.

As long as the correct polymers were used in printing (it seems that he has chosen someone very familiar with this process) it would be of little concern.

464 HP is better than the old 303 T/A engines that were also low deck blocks first topped first with tunnel port heads, then later on, RA IV heads after it was determined that the tunnel port head had too much cross sectional area, along with the pushrod tubes disrupting the fuel air charge.

I can't remember what the 301 based engines Tom S had built dynoed at, surely he'll comment, but they ended up I believe about 383 CI, if I remember correctly.