I would recommend Delco stuff except their wires and caps have been HORRIBLE in my experience atleast on the L31. I switched to Accel and built my own 300+ race wire set. Used the aluminum 90° shields for a LT1 application. No more melted boots or wires that pulled apart. In the stock looms I went through 2 sets of Delco wires in under 3 years with the stock manifolds. The wires and boots would literally cook and crack. The caps were no better. They would start crossfiring internally. My last cap and rotor was a Davis DUI and I had their coil and module as well. HIGHLYrecommend. Their wires are not as good as the Accel 300+ though. I drove the Express van with headers for more than 3 years using the DUI and Accel setup with NO failures.