rear inlet openings of the 89-93 and 94/95 superchargers

ARV90SC

Registered User
wondering if anyone had any pics or any other ways to physically tell the difference between the both, i know the plenums are both different and must be used with the correct blower so i thought the rear opening mite be different? the magnum powers ones are squarey, and the older style is oval
 
Older style on top, newer style on bottom:

M90comp1.jpg
 
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