Quick/dumb question- how to visually identify a 340 vs 360 vs 318 (with a 4bbl)?

RichardJ916 said

Theres casting numbers on the drivers side of the block to be seen or the ones stamped into the block just under the drivers side head.

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Ok... Thanks!
I figured that there must be identifying markings on the block. Are they visible without pulling the motor?

Are the markings obvious or will they need to be decoded?

IIRC, the big blocks are easy to identify thanks to an obvious marking right in front of the intake manifold...