you may need to fabricate the exact rear entry plenum you want, would the huge Big Gun casting work with a cover plate over the opening to use a smaller throttle body?
Whipple has this kit, i don't find the entry plenum available separately nor do i know what the bolt spacing is to fit another housing
https://whipplesuperchargers.c....view&product_id=370
i'd call & talk to them about a front drive / rear entry set-up, they might be able to put together exactly what you want? maybe something like this https://whipplesuperchargers.c...s.view&product_id=27
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