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

Hi guys! Trying to decode VIN and/or fender tag to confirm my 64 Cuda originally had a V8. Tried online decoders with minimal success and the old 'go to' decoder is now $50. I really only want to confirm engine size. Any thoughts appreciated! Also included fender tag below.
VIN V855108644 decodes as follows:
Description Interpretation Code
Make/Model/Engine:
Plymouth Barracuda, Valiant V
Model/Series: Barracuda, Taxi 8
Year: 1965 5
Assembly Plant: Los Angeles, CA 5
Sequence Number : 108644 108644
fendertagcuda.jpg