And even with the "stress mounted" Indy Car engines, they were about the same bank angle, and "adaptor" doesn't mean a tube frame. Indy Cars used to use a "sheer plate" that was designed to allow dimensionally different engines to fit the same tub as well as to break the engine away with minimal damage to the tub.
You have to remember that a lot of the cars that used Judd engines (like Courage and Lola) were customer cars that had to take various engines that could be stipulated by the customer.
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