The idea of the Spec Focus is:
a really nice quick race car for a minimum expense. So.......the preparation is really minimum. The SVT and 2.3 require very little preparation other than safety items. You see Matt's upgrades, suspension items that are very reasonable,.... and safety.
I have been running Mid Ohio for several years with my SVT, R compunds, Koni yellows, and carbo tech brakes. times 1:57+
In a Spec Focus I can do 1:47:040. That is about eleven seconds faster.
Others did 1:45:6-- fastest laps.
This lap time differential I think is due to more camber allowed with the LCR camber plates and rear adjustable subframe, and a loss of about 300+lbs.
That is about all you see when it gets down to significant effects of the race car.
So, a fast car that is relatively an easy build. relative to all the other options out there for Ford types.