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Medictuner · 11-03-2021, 09:21 PM

I am working on a 350 stocker engine and have a choice of 2 intake manifold castings, 3997771 and 340261. Does anyone have any data, testing, etc. which shows one being better than the other? Thank you.

11-03-2021, 09:21 PM	#1
Medictuner Junior Member Join Date: Nov 2021 Posts: 1 Likes: 0 Liked 0 Times in 0 Posts	SBC Intake manifold question I am working on a 350 stocker engine and have a choice of 2 intake manifold castings, 3997771 and 340261. Does anyone have any data, testing, etc. which shows one being better than the other? Thank you.