So......how about some 'B' Body Vans.

[DeltaV]

 

[DeltaV]

https://www.caranddriver.com/features/g14517033/1970s-custom-vans/

 

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[Hey-O]

 

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440 powered

 

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[DeltaV]

Not mine

Here's a 440 powered, dually beast near Norfolk, Virginia

https://norfolk.craigslist.org/bar/d/suffolk-1976-dodge-diamond-motorhome/6879110453.html