Sorry to burst your bubble, induction, but an E0xx code means 1980, not 1970, making it impossible to be a BOSS block. If I were to guess, it's probably out of a T-bird or other full size car (just going by model year), though the truck blocks are more common to find now. Hope this helps.
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Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch 