Yes, original engine and trans.
What have I replaced? Hmmm... over the years, aside from oil changes, tires, brakes, spark plugs, and other usual wear and tear items (by no means chronologically ordered):
1 Alternator (actually, put in a DC Electric I got at a good price which died after a few years, and have been running the original since);
Repaired LCM first for headlights then again later for taillights;
A/C dryer rusted out a couple years ago;
2 or 3 Air ride compressors;
1 Serpentine belt tensioner;
1 Brake master cylinder;
1 Idle air controller;
1 front wheel bearing;
1 pair of lower ball joints;
1 pair of stabilizer bar end links;
PCV hose from valve to intake;
1 battery;
A few COP units;
Will need a new fan blade asap, mine cracked yesterday;
1 window switch;
Repaired original BCM, and have put in 2 replacements since;
Added these extras:
Added an LED lighting strip to the trunk;
Swapped in 6-disc Ford stereo head unit;
Swapped in a carbon fibre intake tube and conical filter;
A dead pedal I picked up from this board (I forget who made it);
Things it needs that I've been ignoring:
Drivers side front spring has lost about half a coil (a small segment cracked off, twice);
Should probably change that fuel filter one day;
Could probably use new shocks;
Upper rad support, which is an aftermarket piece installed after a crash about 6 years ago, is cracked to **** and needs to be replaced;
The body has taken a beating - probably every panel has a ding or scratch or crack in it;
I bought this car in 2009 I think, with 251k kms on it.
. Wasn't my first Panther, didn't bat an eye.