I had severe problems with the ignition wires on my 02 rcsb silverado. I ended up purchasing a 25 dollar set of Oreilly's Ominspark brand wires for a 98' C1500. They have the coil end terminal and a 90dg boot on the other end. I looped the two wires on the driver's number five and seven primaries under the number five primary tube. It made it alot easier having almost a foot of wire to play with. Other than ignition wires, they are a wonderful set of headers for the price and were perfect for waking up my 4.8L. And now with freshened heads and a 6.0L cam, my 4.8L really makes some power.