P0340 Problem Figured Out But...

So i have finally figured out the p0340 problem on my 2000 mustang gt. It turns out that after checking everything that the magnet or metel piece on the cam gear is no longer working. The sensor is not recieving a constant signal from it. And of course i have the windsor engine so i cannot just easily swap cam gears. So now question is, how in the world does the metal bump piece go bad and should i just upgrade the cams to vt stage one cams? Eventually i will upgrade it more as i build it up to be procharged but thats in the future.

Without the sensors it runs really rough. Bucks when going slow, idles like it has a cam, and misfires. The sensors pretty much tells the computer the timing of engine(or something like that).Trying to find a stock windsor cam with the pressed on cam gear and see if that fixes it. Im still trying to learn the engine in these 4.6's, never had one and of course the one i get has an odd problem but im determined to get it fixed and build it up.