i have a 96 LS. I have purchased a 97 GSR head and what i think is everything i am going to need to do the complete swap properly. I purchased a P72 ECU, will i be able to keep my stock distributor?! will it fit onto the 97 GSR head? and sorry if this is a dumb question but, can someone explain what the knock sensor is? wat it does? do i need to purchase one? thanks in advance.. please remember i am new to imports and swaps!