Changing coolant in Ford V-10

When I bought our 1998 V-10 two years ago with no service records, with 35,000 miles on it, I decided to invest in it. I know all about the V-10 spark plug problem. I had every hose replace, radiator and engine flushed, brakes flushed, front break hoses replaced, shocks, steering stabilizer, tie rod ends, and caster changed to +5. Rear end had a small leak, replaced seal and new oil,and mass air flow sensor rebuilt. I forgot what else I had done, but what a difference. Paid $3,500 to a trusted privet garage with a long history of good service. Went on a 2500 mile trip with 13 mpg average, no cooling problems, or any other problem. Flushing breaks, shocks, and steering stabilizer, and +5 caster made huge difference in handling.