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I thought all Packard window lift were hydraulic??
Only through 1954. For 1955-56, Packard used electric motors supplied by Delco.
The round motor design used on 54-55-56 Cadillac, Buick, Olds, and Pontiac (also Delco unit) looks quite similar, but clearly won't bolt up, directly, to our Packards.
A GM vendor in the hobby offers a "reproduction" with rectangular motor, which retrofits back to 1955, but same problem with bolt-up:
http://www.opgi.com/p/body-moldings-trim/24321/209/CH28542.html I suspect some sort of adapter (pigtail) would also be required to plug in place of the older, two-wire, round motor, GM models; that much might be compatible with the harness in our Packards, since they were supplied by GM-PED.
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