You need to lift the car up, use something to support the engine (hoist will work), then unbolt the motor/tranny mount. After that, unbolt the front sub-frame bolts, loosen the rear ones, and let it slowly lower down in the front. This should give you enough room to allow the oil pan to clear the pickup tube.
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'13 Mustang 3.7V6 - MT82
'00 GP SE (L67 Swap, XP, Headers, 3.25")
'98 GTP, '01 Bonne