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Re: bbc in med duty trucks ?
Quote:
Originally Posted by 95 S_Trucker
The L21(98-00 medium duty specific)454/7.4 was a standard deck engine(also Gen VI). All of the L18(01+)496/8.1 engines were tall deck.
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That makes sense because I think the medium duty L21 used the same intake manifold as the light duty L19 7.4L.
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1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.
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