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Re: Is break in oil on an L31 a good idea?
21060 or 21061 on my engines . its the same filter just 5-7 psi pop off valve inside difference .
get the wix version for good bang for the buck or napa gold .
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77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
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HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .
EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
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