Heads for 350 2-bbl Converted to 4-bbl
Short answer: For a 350 2-bbl converted to 4-bbl that you want streetable with low-end torque and decent mileage, use a mild cam — the Pontiac 067 grind or a Summit 204/214, and go no bigger than the 204/214.
Pontiac engines like a wide lobe center (about 110–114°) for a good idle, and the heads favor low lift (factory cams are around .406″, and the ports don’t flow better at higher lifts) — so adding lift is mostly wasted. For deeper reading, work through Jim Hand’s Pontiac articles.
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Content last modified: June 13, 2026 at 10:06 am
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