1995 Crown Victoria motor into a 2000 mercury marquis?
They both used the 4.6 Modular, you'd also likely have to swap over induction, throttle controls, modules, and check if tranny is compatible; http://www.idmsvcs.com/2vmod/tranny/modelnumbers/crownvic/
Possible OBD1 vs OBD2 issues.
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