My 01 Sunsetter VLX has the Corvette LS1 package - and boy does Indmar want to rape you in parts prices.
She started running rough - since I just got it recently and the previous owner wasn't exactly good with maintenance, I figured I'd change the fuel filters, plugs, and if those didn't work, the wires as well.
Pulled #8 and #6 wires, both broke inside the plug boot (yes, I firmly grabbed them). Go to buy new wires, and not only are they a special order, they are $190 after taxes! My refusal to both wait AND pay an outrageous amount for cheap ass plug wires has me shopping for an alternative. Since Jegs is local to me, I stopped over there and picked up a cut to fit universal SBC 8.5mm wire set (Jegs brand), and an MSD crimp tool. Set me back under $50 total.
Tool wise, you need a vice (any cheapie one will do), razer blade, dykes, and a pair of needle nose pliers Also a good idea to have a volt/ohm meter to check resistance on the wires to ensure your crimps were good. Measure, cut, strip, crimp, slide the boot on, and good to go. The new wires had 1/10th the resistance of the old wires, and 1/4 the cost.
Plugs looked good (they were the originals from 01 with 335 hours, and were oddly gapped at .040 when the book calls for .050, not that it would hurt anything). The #2 and #8 plugs were also not ratchet tight. Swapped out for NGK TR55 plugs, as I only run NGK plugs in my stuff. Put it all back together, swapped filters, and she fired right up running silky smooth once again.
My only real point to this was for anyone later on searching for help on LS1 wires would know that Indmar's wires are NOT the way to go.