How many miles are on your 6.5td
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6.5 td in 1998 k3500 crew cab duelly 4x4. 524000 and hopefully still many more. Change the oil every 3000 and keep the rpm down . She will last forever. Straight 3" pipe and using 100-1 two stroke oil to lube the pump . Relocate the pmd if not done yet. Saves a whole lot of grief. Everything is as it left the factory.
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I have 448XX on the 84 CUCV no it hasnt rolled over I Got it straight from the Goverment am planning next spring to covert it to 12volt and turbo charge it along hopefully a 8 lug swap to get a little better ratio in it 3.08 is a highway gear and my 93 has 221,XXX I am the second owner with it as well and I love that truck