How to set timing on a 1987 C10 TBI 350?

I was wanting to know the right way to set the timing on my 87 C10 truck. Its got a 350 TBI and I had replaced the intake on it and now i just need to set timing. I know your supposed to disconnect some wire, need to know where the wire is at. I have a timing light. Didnt know know if i had to disconnect battery after i had set timing to reset computer or what. And to do i need to set timing to 0 degrees.