Durango 5.9 Magnum R/T any advantage over any other 5.9 Magnum

dusterglenn said

Everything I've read tells me the production 5.9 cam is the same as the one used in the 300 hp crate engine, not the 380 hp.

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The 300hp create is a magnum long block dressed like an LA and a dual plane M1 4 bbl intake. Apparently with headers they Dyno 320hp. 380hp has an M1 single plane and something like 286 .501 cam and Dyno 400-420 hp.