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I ran a 3.5 IP with 3.5 injectors on a 3.0 block in my 93 SD and got better mileage than I'm getting in the 87 300D. Go figure. The 3.5 IP governor steps in a few hundred rpm earlier than the 3.0 IP but I don't venture that deep into the pedal to care.
Sixto
87 300D
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