I had seen that page, and have now found the engine SN. But mine is like the one you listed - F0###00T (or maybe F0###CCT). But the "F-" only shows for 66-67 Olds F-85, doesn't seem right based on being told that it was from a mid-late 70's with an HEI ignition.
'69 1/2T stepside, Sea Foam Green, 250 L6 w/ 3 on the tree, not an option on it, in the family since new.
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