i have been experiencing the bucking in my sc that i have seen described on this site. from what i have read you all seem to go towards the cam sensor. i read a post that it only took 20 minutes to replace this. i am mechanically inclined and i only have 1 question. in my chiltons book i see a camshaft sensor assembly with no. 12a112 , a synchronizer assembly no.12126, and a syncro positioning tool no. t89p-12200-1. do i need all of these parts or just the sensor assy. also can you give a price and are these no.s the actual ford part no.s i know that this is more than 1 question but i do carry on. p.s. i have 150,000 on the car and it runs great except for this intermittent problem.thank you