273 engine questions

I picked up a 65-66 273 4bbl engine a few years back to install in a 1966 dart I had. Long store short I ended up selling the car but still have the engine which I am trying to sell.
Is there any more numbers on the block casting? Isn't the picture of the casting numbers incomplete? Should the block size be in the next three numbers after the dash mark,
I looked up the casting# and have a few questions if someone could help me understand.
Block # 2465330-3 (64-66 LA) with SP casting under the block casting
Heads # 2465313-2 (64-65)
Intake # 2536563 (66-67)
And a stamped number on left front of block 42303
And engine is blue not the correct red.

In researching the web I read that a 66 intake can not fit the 64-65 heads because the angle is wrong. Yet the 273 I purchased was told it was running prior to being pulled from the car and if that's true why is the intake working with the heads?

I also read other forums where mopar took left over parts and made them work to clear inventory and if that's the case could they have made the 66-67 intake above work with the 64-65 heads?

In other research I was trying to find out if the engine was a commando model and various forums again I read that there is no casting on the block that the only way to truly tell is by looking at the pistons...yet one guy told me there was a casting on the block that my engine was not a commando. So how do I really tell? Is the SP casting on my block the key?

My goal is to validate the engine so I understand and can past the correct info onto the buyer.

My thought since the engine was painted blue is that somewhere in it's life it was repainted the blue to make it look like a 318. My gut tells me it's a 1965 engine because of the heads (64-65) and put the 4bbl intake (66-67) on it after having a machine shop make it work. Other than that I do not have any answers as to why I have a completely assembled engine with intake and heads that are not to be married.

Any help would be great. Thanks

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I picked up a 65-66 273 4bbl engine a few years back to install in a 1966 dart I had. Long store short I ended up selling the car but still have the engine which I am trying to sell.

I looked up the casting# and have a few questions if someone could help me understand.
Block # 2465330-3 (64-66 LA) with SP casting under the block casting
Heads # 2465313-2 (64-65)
Intake # 2536563 (66-67)
And a stamped number on left front of block 42303
And engine is blue not the correct red.

In researching the web I read that a 66 intake can not fit the 64-65 heads because the angle is wrong. Yet the 273 I purchased was told it was running prior to being pulled from the car and if that's true why is the intake working with the heads?

I also read other forums where mopar took left over parts and made them work to clear inventory and if that's the case could they have made the 66-67 intake above work with the 64-65 heads?

In other research I was trying to find out if the engine was a commando model and various forums again I read that there is no casting on the block that the only way to truly tell is by looking at the pistons...yet one guy told me there was a casting on the block that my engine was not a commando. So how do I really tell? Is the SP casting on my block the key?

My goal is to validate the engine so I understand and can past the correct info onto the buyer.

My thought since the engine was painted blue is that somewhere in it's life it was repainted the blue to make it look like a 318. My gut tells me it's a 1965 engine because of the heads (64-65) and put the 4bbl intake (66-67) on it after having a machine shop make it work. Other than that I do not have any answers as to why I have a completely assembled engine with intake and heads that are not to be married.

Any help would be great. Thanks

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Block # 2465330 - 3?? - ?, in the block casting picture, there is usually more numbers. If you can fill in the question marks I believe it should tell what the block Is. Are there any more numbers?