George,
It takes about the same as with all reliable conversions: initiative,
time and money. All not being equal! The hardest and most time consuming part is the replacement of the OE steering system with rack and pinion, either front steer or rear steer. This HAS to be done as there is no motor besides MB that has the clearances
to clear all the steering mechanism. This is the 'money' part...have a professional do it if you're not comfortable with your skills.

I've built and done swaps for over forty years and this is a toughie but well worth the effort, almost equal to the Corvair/Z28 I did back in '72. A great sleeper for the street!

Once the chassis is setup, steering again, the rest is not much of a problem as the room is there. For the small block Ford you have to go with the serpentine belt system and shortened water pump used in newer motors. A T5 5spd tranny fits fine but with the use of a McLeod hydraulic throw out bearing that slides on to the guide tube of the tranny as there is no room for a throwout fork. An aluminum radiator 26"wide by 19" high fits nicely and is common. Mine is a 26 X21 to better cool the 5.66L motor. Motor mounts are stock MustangGT with adapters to the crossmember.

Mine has all the OE accessories...P/S, A/C, and a 120A alternator
along with 3" exhaust, Bassani SS muffler, Corvette diff w/LS, 400E brakes, adjustable rear swaybar and a host of other mods. Weight is 2980 and is 54/46% f/r balance with aluminum heads and the battery in the trunk.

Any questions, feel free to ask...
Tobias MB
4 MBs