55-6 Chevy wiper motor is drop in for the V8's (with possible exception of needing some spacers) but hard to find and expensive. Newport Engineeringhttp://www.newportwipers.com/ has a modern kit but you will have to remove the original mechanical bowden cable valve control and modify a piece for the new electric switch. Unless you find the washer pieces for the Chevy motor or make an adapter for the Newport, both options will lose the co-ordinator for the windshield washer if that is a concern. Those conversions are shown in the last two pages of this thread and there is also a photo of a junkyard motor approachhttps://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=11642&viewmode=flat&order=ASC&type=&mode=0&start=0
Another option is to have your vacuum motor rebuilt by Fickenhttp://www.wiperman.com/ to it's original specs and performance.
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