I had an 03 F350 with the 6.8 V10. I'd still have it if it hadn't rusted into the ground, it was a plow rig in Mass before I had it. The 02 will be a 2v with the PI heads/intake. #1 issue with the early 2v V10s is spitting spark plugs. 2002 was a change over year as Ford added threads the spark plug holes to prevent this issue. Early 02s will have shorter threads. Count how many times the plug screws out, if its 7 or 8, you have the later long thread heads.
All late 4.6/5.4/6.8 use coil-on-plug. Since their inception, plenty of complaints of coils going bad, but in my experience all are misdiagnosed. The rubber boots on the coil can fall apart from heat/exposure/dirt and allow the plug to short, causing a misfire. The boots themselves can be changed quickly and cheaply without replacing the whole coil, though the back-most 4 plugs are well under the cowl, kinda un-fun.
Otherwise, Ford modulars are absolutely bulletproof and the pulling power of the 10 is awesome. They are not 460s. Spin them up and listen to the split-crank V10 song. Fuel mileage sucks but compared to diesel, cost a fraction to purchase and operate. I got 11.4mpg on a 2000mi road trip pulling a trailer. Uses the same Motorcraft semi-synth oil and filters as all my other Fords.
I'll admit I'm a Ford Modular nut-swinger, but its (early) drawbacks are avoidable, the rest easily eliminated. I'd buy another 6.8 in a heartbeat, but I'm holding out for the later 3v (457ftlb) version.
-Pat
Interceptor Motorsports
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