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You have a 1987 old cutlass with a 307 olds motor you want to put a Pontiac 400 in it how hard will the be to do?
Wiki User
∙ 12y ago
Pretty much a bolt in, you will need motor mounts for the 400 Pontiac, the transmission will bolt up since Buick, olds, Pontiac have the same bellhousing. I have found headers from a 1968-1972 GTO will fit with some slight mods. I helped a friend install a 400 Pontiac in a 1981 Grand Prix that had a 231 V6 some years ago, was pretty straight forward. Only real problem we encountered was the car overheated with the thin single row V6 Radiator, that was easily solved with a 3 core radiator.
Wiki User
∙ 12y ago
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