I would take the SVT parts and use them, rather then a transplant. Intake, intake manifold, lower intake, etc... That would probably be your best bet having the ATX and all

"My family hauler can kick your family hauler's @SS!"
~~~~1999 Contour SE Sport~~~~
-KKM True Rev
-Custom cat back Flowmaster exhaust
-All Cat's fixed.
-SHO Shop Off-Road Y-pipe
-Many other Mod's done...