I have never seen a clutch do that....as for the chip, i would wait till you ahve done all your bolt ons before you do one....or you will ahve to reprogram the chip again to your car, to optimize your car with all the new adition parts...chip should be last....
As for the rev limiter, on a V6 (i cannot speak for the Zetec) that is a ver dnagerous thing to play with...I ahve read about countless times how DemonSVT has stressed that #1 the stock cams, start to lose power after redline...so theres no effectiveness, # 2 in the V6, our motors were not desigend to be pushed over the redline, i ahve heard of people damaging there motors because they set an 8 grand redline...
its fun and all, but i would not reconmend it.
But as for the chip, wait till your bolt ons are all done, then go and chip it.
Lupe