The 78X & 78XW (with the W stamped later) was a '64 GTO engine code deal, only.
On the '65 Pontiac & Kansas City Cowl tags, the accessory codes (bottom row) should list an L in the second grouping, ie, 2L if the LeMans or GTO was factory optioned with a 4 speed.
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Buzzards gotta eat... same as worms.
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