knock sensor grinding??

[torchanniv03]

i have a '98 cobra teksid block, and i am not sure how far i have to grind down the two knock sensors. if anyone has some info or even better, pics, that woukd be greatly appreciated!! :beer:

 

[prostkr]

there will be approx 3/8" of the boss left. It needs to be ground at the same angle as the vally. Use clay and set your lower on to be sure you have some clearence.

 

[torchanniv03]

i guess i have to grind down the casting?