Re: 87 Crew Cab 454/TH400 to Cummins/NV4500
Then It was time for the 454 to come out. Notice in the first picture the cracked exhaust manifold. Also note the amount of oil around the bellhousing, the rear main leaked bad, strangely when driven, especially at freeway speed it would somewhat seal up. This is the original engine with only 80k miles so that is probably the issue with the seal leak. It was not driven much but towed heavy.
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