Getting ready to swap an LS1 into my 87 Pickup, need some help

[UATahoe]

I will be swapping in an LS1 out of an 01 SS Camaro and I have the harness and computer. My truck currently has dual tanks and I want to keep them. The in tank fuel pumps have already been upgraded to the ep381 pumps on both sides because a swapped in a 383 about 2 years ago I guess. I kept it as a fully functioning TBI system. So moving forward, am I going to be able to ditch the entire tbi harness and computer when I swap in the LS? Or is the factory ecu still needed? I was hopping to rip it out and ditch it all together.