First of VIN is V8, does this indicate V8 engine?

JDMopar said

If I remember right about the AB numbers, 30 is a 273 2 barrel, 31 is a 273 Commando, and 32 is a 273 Formulas S with Commando motor.

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Nope, it's more confusing than that. 31 can be either two or four barrel depending on the year. '65 it's a four barrel, '66 it's a two barrel. 32 is four barrel in '66. Formula S is a different code down that line. '64 only had one 273 available and that was 30.