In regards to the turkey pan:
I respect the engineering team that designed the 351C tremendously, they designed an unbelievably bitchen motor. Bitchen in every way. I see no reason to second guess them and defeat the features they designed into the motor for a reason. I can point out a quote in print where a big name engine builder (Mario Rossi of Reed Cams) admitted using the turkey pan on his NASCAR motors to keep hot oil off the intake.
I think it is reasonable to recommend if your manifold is going to be heated by exhaust heat use the turkey pan. That's the way the engineers who designed the motor intended it to be. If there shall be no exhaust heat, the turkey pan isn't needed.
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