If you want to stick with stock or near stock type heads forget the 289 heads unless you have a set of the old 289 high performance heads (machined spring seats and screw in rocker studs stock) go for the D00E 69-70 351W heads if you cut the thermactor bump out of the exhust port and clean them up they can be made to flow as good as a set of edelbrocks ! and they have 61cc chambers !
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