Not Ranked
I have a late '66/ early '67 Hi-Po 289. It has screw in freeze plugs.
Stroking a 289 is "NOT" recommended, Unless it is for a "one time" race shot.
The 289 Block is strong but not enough for "stroking", with proper "tweaking" it should run like a bat out of he$$. If you need more "OOMPAH" get a 302 or a 351. Just info I've gleaned from articles about S/B Fords, FWIW
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