ok, well this makes absolutely no sense at all. Mcleod says that pressure plate is only 1800 lbs which is fairly close to stock on the high perf engines, so it definitely should not be overly hard to push the pedal in.
They can respring it to make it lighter for $150.00 but then you run the risk of having it wear prematurely or possibly slip if you have good traction and dump the clutch. If you don't have sticky tires and don't beat the heck out of it frequently and your linkage is not causing any problem, you could have it resprung 100 lbs lighter and use their dual friction disc and it will be fine.
Also, if you find it "almost" tolerable but would like it a little easier to push the pedal in, then installing the needle bearing kit on the pedal bracket may help enough and if it doesn't you could still add the heim joints or you could leave the pedal support and try the heim joints first which would be easier.