Best Years for the 318 LA?

toolmanmike said
The 66 and 67 920 heads are closed chamber and supposed to be good ones. I don't think they flow much better than the 302's and they don't have hardened seats.
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'66 would be coming off a 273. The best head to ever come on a factory 318 for performance was the magnum heads. But the OP said LA.