3720991 is apparently a 1956-only 265 block.
The stamping on the engine pad in front of the passenger head should indicate the original HP and engine/transmission configuration.
Based on the heads' casting marks, at least one site suggests they may be from a '56 Corvette 2X4 bbl, 283?, a '58 pass car FI, chamber same as '57 270HP Corvette
It seems some of the details from that site may be off ('56 283?).

 

The KEY to the value of this setup is the numbers on the carburetors. IF they are the correct numbered parts for a factory 1956 dual quad setup, they will add significantly to the value.

OK, lets take a look at what we know for sure:

The block casting number is 3720991. That is the correct casting number for a 1956 265 block. This is the only V-8 engine block used in passenger cars and Corvettes in 1956. There were no 1956 283 engines installed in Corvettes or passenger cars.

The head casting marks confirm that these heads are casting number 3731762. These heads were released during the 1956 model year, and were the "correct" heads for use with a dual four barrel setup.

Intake manifold casting numbers:

• 3728725 (1st design),
• 3731394 (2nd design)

OK, now we need to look at the carburetors themselves. Each carb has 4 different numbers associated with it, as follows:

Front Carburetor Numbers (Note: NO Choke on front carb):

• Carb tag number - 2419S
• Carb top air horn number (cast or stamped into part)

* 6-1114 or 6-1122 (used through Feb of 1956),
* 6-1151 (used to about July of 1956),
* 6-1151 or 6-1203 (used Aug through Sep of 1956)
- Carb main body number (cast into part)
* 0-049
- Carb base throttle plate number (stamped in base throttle plate)
* 1-1387B

Rear Carburetor Numbers (Note: Carter Climate Control 170 AB238S Choke on rear carb):

• Carb tag number - 2362S
• Carb top air horn number (cast or stamped into part)

* 6-1114 or 6-1122 (used through Feb of 1956),
* 6-1151 (used to about July of 1956),
* 6-1151 or 6-1203 (used Aug through Sep of 1956)
- Carb main body number (cast into part)
* 0-049
- Carb base throttle plate number (stamped in base throttle plate)
* 1-1387B

This is the best info I have available at this time.

The intake manifold (restored) is worth about $500
The correct dual carbs should be in the $3000 range.
The Bat Wing air cleaner would be separately valued somewhere about an additional $1500.
Total = $500 + $3000 + $1500 = $5000

If the setup has "replacement carbs", which are correct looking WCFB carbs that have been built to correct 1956 Chevy specifications, but the numbers are wrong (Chrysler parts, etc), then deduct
$2000 from the value of the carburetors for a total value of about $3000 for the entire setup.

 

Are you asking about ONLY the intake system (intake, carbs, air cleaner)? or the full engine? If you want to get maximum value, you need the casting numbers/dates from the intake, the carb numbers, photos of the parts including the air cleanr (top and bottom), AND if the engine is included then add the photos of it along with photos of the cast numbers and dates, the application stamping on the front of the block, and full description of all the parts included...
This would be worth the MOST$ to some one doing a full fledged RESTORATION and they would want all the cast/stamped dates to be consistent with their car...

 

You dont know what was done to the engine block, taking somebodies word can be an expensive lesson, all of the bolt on stuff can be reused but even in that condition you will need to tear it down and go through it again

 

With the intake not being bolted down, you might find some surprises inside. Definitely need to pull some covers off. Cannot go by what the guy said.

 

Hi guys. I’m trying to figure out a value for an engine. Obviously different people will be willing to pay different prices. But is there a general area most can agree on for a 265 dual quad engine with a batwing air filter. I’ve seen just the air filters get like $1,000. But I don’t know a relative price to quote a guy looking to buy my motor. It should be from a passenger car from what I understand and that it was called a “super turbo fire”. The guy who gave me this information suggested maybe 8-10k but wasn’t completely sure. Any suggestions or information?

 

I would sell it to the guy that suggested 8 to 10K.....

 

I wish he would buy it

 

8-10 thousand ???? i think you iwll be hard pressed to find a guy to buy it....not knowing how long its been sitting,,,who rebuilt it,if it was rebuilt,and a quality job done......hard to take someones word, when possibly they dont even know(the seller).......I think realistically 5,000 bucks

 

I was thinking 8-10 was really high. I know some of these parts get top dollar if fully original. But still. I feel like the guys ok here, once I can get more numbers off the engine, would be more realistic

 

lots of variables. It's a really neat piece. But really only worth top dollar to someone that has a car that it belongs in. Completeness and condition will be very important.

 

what are the numbers on the exhaust manifolds?

 

That’s a very nice acquisition.

 

If the heads are real 56 the casting number will end in 762. Intake should be last 3 digits 394 with 762 heads. need pics.

 

Ok thanks for that information. I’m going to try and look to see what those numbers are hopefully next week but this is great to know

 

What’s up with the stand offs where the water pump should be?

 

This is a part in my grandfather’s shop. I’ve been selling off a lot of items, and don’t know much about what he was doing. So as far as an answer I can’t give you a good one for that question unfortunately