What will I need 6 to a 340 on a 66 Dart?

start searching for a pair of 64-66 A body 273 V8 motor mounts. only need to add a couple of washers when bolting up the one mount (I forget which engine side) & weld a small triangle piece onto the other mount (that info is posted somewhere here on FABO). A '66 & up V8 904 trans (for your rod type shifter linkage as opposed to the early cable shifted). the guys here have covered everything. the best manifolds are a 68-70 340 ex manifold on the passenger side & a '92/early '93 ex manifold on the drivers side. source a "392" center sump oil pan/pickup (middle one in pic).

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Have you ever tried this manifold on the drivers side?