Comparison between MustangII IFS systems? (AD Truck)

[50 Chevy LS3]

I did just what you are doing, started researching what brand to use about six months ago. I boiled it down to basically two brands. Fatman and Total Cost Involved. Both made in USA. The parts I've used from TCI seem to fit very well, at least in my experience. Fatman is who I settled on, however. I bought the stage 3 coilover kit and just finished installing it. The reason I picked Fatman is their coilover kit is designed for coilovers, not a coilover conversion for the M2 kit. Both kits have shim alignment, which I like ALOT BETTER. Both have great instructions, Fatman seems to be more accessible via telephone. I'm very happy with my kit.
Fatman pros, IMO.
1. Coilover kit engineered for coilovers.
2. Heavy duty main X-member. 5/16" steel.
3. Only kit for an "AD" truck with no frame c-notch for r&p, unless you buy the super low kit.
4. Heavier A-arms. .188 I believe.
5. A-arms made in house.
Fatman cons, IMO.
1. Expensive, sort of.
2. Sway bar NOT included, extra $180.
3.No boxing plates included, but, you really should build your own, to fit YOUR frame. I used 3/16" steel.
4. Fatmans X-member welds flat on the bottom of your frame, others, such as TCI, incorporate a gusset into their X-member. (you can easily fab your own with Fatman)
I like both companys and have a TCI rear kit on my truck and very happy with it too.
I'm a HUGE fan of "MADE IN USA".