They don't flow enough air for a 350. It'll run and will bump your compression up, but the ports are too small. I threw a set on those away recently. They'll work decent on a 305 or a 307. Anything bigger and you're just choking the engine.
@johnsarian_cu
2 ай бұрын
I'm by far not a sbc expert. Years ago I remember working with my friend helping to get his father's 62 Impala he inherited back in good condition. Thought it was an SS, for sure remember a 327-4bbl, but it had a Powerglide! 🤮 Anyway, he tried to get those heads to flow better and maybe put bigger valves in them, but every machinist told him "wrong heads for that". I wonder if they were power pac now.
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