1961 390 V8 Engine Block Serial Number location

[dontano]

Where is the engine block Serial Number located? I have a 1961 Thunderbird, but sometime in the past the engine was replaced with a newer 390 V8. I want to know the exact year of the engine.

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[biddle]

Where is the engine block Serial Number located? I have a 1961 Thunderbird, but sometime in the past the engine was replaced with a newer 390 V8. I want to know the exact year of the engine.

Your subject should be a brief summary, not multiple sentences. "Where is the engine block Serial Number located? My car is a 1961 but it is not the original engine. 1961" is being revised to "1961 390 V8 Engine Block Serial Number location"

 

[74 Harley]

Look on the sides of the block for the engineering number (example C4 AE)
The actual date code should be near the oil filter on the oil pan rail.
Your '61 should also have a 2bolt motor mount pattern.
They changed to 4 bolt in '64.