Where are the casting numbers on a 454?

Locate the casting numbers which can be found on the rear driver’s side flange that meets with the transmission bellhousing. This may require that you get underneath the cars in some vehicles. The codes may also be located between back of the engine and the firewall.

How do you know if its a BBC block?

The first indication that a motor is a Big Block Chevy is if the codes are stamped above the timing chain cover. All Big Blocks are stamped there. Small Blocks are stamped on a pad in front of the passenger side cylinder head and are often covered by the alternator.

How can you tell a 427?

The surest way to identify a 427 engine is to decode the engine casting number located on the engine block.

Locate the engine casting number on the rear of the engine block on the bell housing flange.
If the number is 3909802, it is a 427 produced from 1966 to 1967.

How can you tell a 454 4 bolt main?

Someone once told me that you could tell the difference between a 2 or 4 bolt main by looking at the size of a hole on the side of the block. If the hole is small, it’s a 2 bolt and if it’s large, then it’s a 4 bolt.

How do you date a 454?

The beginning letter of the date code will represent the month (the letter “A” would represent January, “B” for February and so on). The next two numbers will indicate the day of the month, while the last digit will tell you the year in which the engine was produced.

How do you tell a 366 from a 454?

454 has balance weights on the flywheel and harmonic balancer. 366 crank is high quality and the same as 396/402/427, 454 is different. 366 has the smallest bores of the BBC’s. If this is a big truck the 366 probably has cast iron headers.

How can you tell a big block from a small block?

A big block engine is physically larger and weighs more than a small block. [4] Larger bores, longer strokes, bigger valves and ports can lead to truly astounding power production. If a small block is a quick and nimble welterweight boxer a big block can be devastating heavyweight.

How tell difference from a 427 and a 454?

if it has two letters it’s 69 or earlier and would have been a 427 originally, if 3 letters it’s from 1970 or newer and would have been a 454.

What does the 8th digit in vin mean?

Vehicle Description Section The fourth through eighth digits describe your vehicle’s model, body type, restraint system, transmission type, and engine code. The ninth digit is the check digit, which is used to detect fraudulent VINs.

How do I identify a 454 engine?

How to Identify a GM 454

Identify the year and model.
Look for decals on the engine.
Locate the engine ID number located at the front of the engine block on the passenger side.
Decode the ID number.
Verify the casting numbers from either the cylinder head, intake manifold or crankshaft.

What are the BBC engine block casting numbers?

BBC Engine Block Casting Numbers 3969858 1968-84 427 3999289 1972-78 454 3999290 1972 402 3999293 1968-85 366

What are the casting numbers for a Chevy V8 engine?

CHEVY 348-409 “W” MOTOR V-8 Crankshaft Casting Numbers. CHEVY SMALL BLOCK V-8 Engine Block Casting Numbers. 366298……………….4…Bowtie, Aluminum, billet main caps, 3.398″ bore with sleeves, two piece rear main seal. CHEVY SMALL BLOCK V-8 Cylinder Head Casting Numbers. 10106178…90……350……….LT5, ZR1, DOHC, 32-valve, pass.

What are the casting numbers for the BBC intake manifold?

BBC Intake Manifold Casting Numbers ALUMINUM RECTANGULAR PORT – Holley 4V Casting Years CID HP/RPO/Config 3866963 1965 396 375, 425 L-37 3885069 1966-68 396 375 L-78 427 425 L-72 3886093 1967 427 430 L-88 3894374 1967 427 435 3×2 L-71 3894382 1967 427 400 3×2 L-68, oval port 3919849 1968 427 390 L-36, oval port, Qjet 3919850 1968 427

What are the numbers on a BBC cylinder head?

BBC Cylinder Head Casting Numbers RECTANGULAR PORT – Valve size 2.19 intake, 1.88 exhaust Casting Years CID Chamber CC HP/RPO/Comments 3904392 1967 427 Closed 106.8 430, 435 L-88/L-89, 1.72 ex 3919842 1968-69 396 375 L-89 427 Closed 106.8 430, 435 L-88/L-89, 1.84 ex 3946074 1969-71 396,402 375 L-89, 427 430 L-88/ZL-1