Info about my engine

[catbatrat01]

Hi to everyone
can anyone tell me what type of engine I have.
I have a 1963 Buick skylark 2dr coupe I think it is a 215 v8 aluminum
I found on the front right of engine block the # 3j1522801

 

[65GS4SPD]

63's came with either a V6 or V8 (215 V8). What makes you think the car has an engine swap? In the meantime I'll look up engine codes and report my findings.

 

[65GS4SPD]

j would be a 63

 

[65GS4SPD]

Buick Engine Numbers (stamped onto top surface of engine block, ahead of the passenger-side cylinder head)

Engine Number Format: A-B-C-DDDDDDD

Where:
"A" was the model code (0="Special", 1="Special Deluxe", 2="Skylark")
"B" was the model-year code (H="1961", I="1962", J="1963")
"C" was a single-digit plant code
"DDDDDDDD" was the production sequence number

Supplemental Engine Code Format: EE-FFF (stamped upside-down in the same location)

Where:
"EE" designated performance specification
(I="1962 / standard compression ratio /two barrel carburetor",
HI="1962 / high compression ratio / four barrel carburetor",
JM="1963 / low compression ratio / two barrel carburetor",
JN="1963 / high compression ratio / four barrel carburetor")
"FFF" is numerical (meaning unknown).

 

[65GS4SPD]

Here is some more to really confuse the matter

SPECIAL & SPECIAL DELUXE
ENGINE NO.	NO. CYL	CID	H.P.	COMP. RATIO	CARB.	TRANS.
JL JZ JM JP JN	6 6 8 8 8	198 198 215 215 215	135 135 155 145 200	8.8:1 8.8:1 9.0:1 7.6:1 11.0:1	2BC 2BC 2BC 2BC 4BC	MAN/AUTO MAN/AUTO MAN/AUTO MAN/AUTO MAN/AUTO
SKYLARK
ENGINE NO.	NO. CYL	CID	H.P.	COMP. RATIO	CARB.	TRANS.
JN	8	215	200	11:1	4BC	MAN/AUTO

 

[65GS4SPD]

How about a picture of the numbers.

 

[catbatrat01]

63's came with either a V6 or V8 (215 V8). What makes you think the car has an engine swap? In the meantime I'll look up engine codes and report my findings.

thank you