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Hello, I'm not a corvette owner but I do possess what I believe is a rare 427 motor. I guess I'm here looking for some information and value of what I have. At the moment it's a standard bore 427 4 bolt main engine.
Here are the numbers that I have on the block: Casting date H187
Block casting #: 3916321
Vin #: 18S400362
Stamped # on deck#: T0822IR
The heads are square port Chevrolet. Head casting #: 3919840
Date code: A128 and A108.
This motor currently has Chevrolet snowflake 4-barrel intake on it.
Was this motor used in Vettes only or/and was it also used in Yenko cars and Copo cars by Chevrolet
Any info on this motor would be greatly appreciated. Thank you
Last edited by Moose2000; Jan 14, 2023 at 06:41 PM.
Reason: Change title
Welcome to the Forum!
Since the block casting number references a 1968 427 (2 bolt or 4 bolt main), I would suggest asking this in the C3 Tech section: https://www.corvetteforum.com/forums...s-1968-1982-5/
Best wishes with your search!
Hello, I'm not a corvette owner but I do possess what I believe is a rare 427 motor. ...
...
Vin #: 185400362
...
This motor currently has Chevrolet snowflake 4-barrel intake on it.
Was this motor used in Vettes only or/and was it also used in Yenko cars and Copo cars by Chevrolet
Any info on this motor would be greatly appreciated. Thank you
I haven't attempted to run the numbers on this but will begin by saying that 427s went into a number of different Chev. models than just Corvettes, Yenko, and COPO cars. I would guess that every car line except the Corvair had a 427 option. The VIN, if accurate, is not a Corvette VIN.
The snowflake intake sounds like an aluminum intake from the Winters foundry. Is there just a single carb mounting block? (Additionally, there's nothing to say the intake and heads weren't added later.)
Last edited by barkingrats; Jan 14, 2023 at 12:39 PM.
IR suffix shows original application for this block was early 1968 Corvette 435 hp, 4 speed, mechanical lifters, Holley 3X2 BBL carbs, 4 bolt mains. First 427 to use the new spin on oil filter.
Assembled at Tonawanda plant August 22nd.
Heads are also correct for this application.
Good stuff.
Casting date H1867
Block casting #: 3916321
Vin #: 185400362
Stamped # on deck#: T0822IR
The heads are square port Chevrolet. Head casting #: 3919840
Date code: A128 and A108.
Originally Posted by avalonjohn
Casting date of Aug 67 lines up with early 68 as well. I am still curiuos about the 1 and 5 in the VIN.
The casting for the block would be good for very early '68 model* but the heads were cast in January of '68 (Axx8), so not originally on this block given the time span involved and the very early #362 VIN (if confirmed to be misread).
*The two-digit 67 for the block casting year would be unusual as it should just be a 7.
This is not to say that the OP's engine is not something desirable, just that I don't believe it's an example of an original assemblage.
my bad as far as the date code it is just a 7.
Also it’s 18S4. Sorry
The guy (a friend) said that all he knew was that he thought it was a 68 corvette 427. He had it tucked away in his garage for quite a few years and was always gonna put it in a 55 chevy and never did. Just cleaning out his garage. I bought it because it was a 427. I wanted one for my car.
Last edited by Moose2000; Jan 14, 2023 at 02:19 PM.
What is the cast number on the intake? It's a little too far forward to read.
It looks like it might be either a 3885069 which was used on both the early 1967 & '68 Corvette 427, 430 hp cars. This intake was also used on the Camaro, Chevelle, Chevy II as well as passenger car applications for 396 and 427 equipped cars.
Or it could be a 3886093 which was used on the later '67 Corvette 427, 430 hp.
Cheer, Greg
Wth. 😝
It was an assembled motor. Forged crank. Rods. Forged TRW pistons. Oil pan with a large reservoir and a flap door It does have an Erson cam.
standard bore
I’m going to go through it and rebuild it. I’d like to know its value as I’m reasonably sure it’s a collectible and valuable motor. I just am not sure what it’s worth.
Last edited by Moose2000; Jan 14, 2023 at 11:07 PM.
Wth. 😝
It was an assembled motor. Forged crank. Rods. Forged TRW pistons. Oil pan with a large reservoir and a flap door It does have an Erson cam.
I’m going to go through it and rebuild it. I’d like to know its value as I’m reasonably sure it’s a collectible and valuable motor. I just am not sure what it’s worth.
I was just wondering about the amount of dome on the pistons and whether the crank and cam were GM with casting numbers to cross-reference to factory performance options.
It appears to me that this is an assemblage of performance components: the block is stamped as a 435hp 3-two barrel carbs; the intake is a single carb (L-88 like); the heads are dated long after the block. As far as value, the block's tier-one value is with the car it was originally installed in. The block, heads, and intake have tier-two value to folks restoring '68s where the casting dates jibe with their cars' production dates. Tier-three value is as a performance engine for a modified car.
Last edited by barkingrats; Jan 14, 2023 at 11:35 PM.
1968 427
