Today "Mustang II IFS" is a generic name for a suspension system built by Ford for a lightweight car in that era of time.
Many years ago, a hobbyist would cut a stock M2 IFS from a donor car in the wreck yard and adapted to fit another vehicle.
The unloaded front suspension will have a maximum of 2700 lbs. Look it up in the original Mustang specification sheets.
The M2 IFS of today is not used parts (unless you go cheap). It is a design that adapts new parts to a specific vehicle.
You select arms and springs based on weight of the engine and accessories.
Being the design is vehicle specific, it must (legal liability) be able to carry the same load as stock vehicle suspension (in your case GMC 100 suspension).
Most will not accept the original heavy and deep inline 6 cylinder engine.
You also need to ask the M2 IFS provider or manufacturer if they will cover damages if a failure of their part(s) results in an automobile accident.
Weld-in kits need to be welded by a professional.
If you lack the skills, I would find a "rod shop" that typically does this kind of work.
Last edited by buoymaker; 10/19/2022 7:33 PM.
