I thought Supercoupe's had supercharged 3.8's in them?

I don't want a v6 I want an 8 but I don't really have the time or the place to do a great big overhaul...I was hoping to get lucky and the 5.0 and trans would just drop in the v6 mounts then I'd simply have to change the CPU and harness....but I guess not.

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Black 91 Mustang LX Coupe
2.3L Auto

Denonford 8250Ti
Focal Utopia 165W
Kicker SoloBaric 15" (round)
Rockford 301S
Memphis 75X2
JBL CSX200.1