As for the $150 for plugs/coils, my brother did the ordering and work and quoted the price he said it cost for the parts. Either way, even if $300+ still worth keeping these GREAT V10 engines when they turn over 100k miles. I plan on keeping this one until it absolutely drops to the ground, and if I need an engine/tranny rebuilt, not a big issue to me. When you price out newer models (mines a 2003 Fourwinds 28A) it just make sense to keep up the maintenance and enjoy it. But, my 1994 Jeep had 250k miles and was going strong before I changed it into a street machine, so I'm not scared of actual mileage. Too many folks put a "death sentence" when approaching 100K on any vehicle.