Based on the info available from the various casting numbers and my memory of the junk truck we pulled it from, this is what Betty will be getting.
14093638 Small Block V8 original bore 5.7Liters / 350Cubic Inches
Built between 1987-1995,
4 bolt main bearing caps,
roller or flat tappet cam – currently flat tappet
1-piece rear seal
Production-Based Block Technical Notes:
• Standard 350 main journal sizes
• Non-siamese bores
• Production-spec cylinder wall thickness
• Lifter valleys machined for hydraulic-roller and flat-tappet valvetrains
350 Bare Block (1986 – Later Style), 1-Piece Rear Main Seal
• Cast-iron 4-bolt block
• 4.000″ bore
• Machined for hydraulic roller or flat tappets
Specs:
•Part Number: 10105123
•Casting Number: 14093638
•Deck Height: 9.025″
•Lifter Pattern: Standard
•Cylinder Wall: Open
•Bore Range: 4.000″ – 4.030″
•Main Bolt: 2
•Main Bolt Degree: Straight
•Cap Material: Gray Iron
•Crank Journal Size: 350
•Oiling: Wet
•Seal Type: 1 Piece
•Max Stroke: 3.750″
•Weight (lbs): 181
•Max HP: 350
•Usage: Street
| Cylinder | Bottom E/W | Bottom N/S | Middle E/W | Middle N/S | Top E/W | Top N/S | Diagnosis |
|---|---|---|---|---|---|---|---|
| When new | 4.000″ – 4.030″ | 4.000″ – 4.030″ | 4.000″ – 4.030″ | 4.000″ – 4.030″ | 4.000″ – 4.030″ | 4.000″ – 4.030″ | Passed |
| 1 | 4.05 | 4.04 | 4.05 | 4.04 | 4.02 | 4.04 | |
| 2 | 4.05 | 4.05 | 4.06 | 4.04 | 4.03 | 4.03 | |
| 3 | 4.05 | 4.03 | 4.05 | 4.03 | 4.05 | 4.02 | |
| 4 | 4.04 | 4.05 | 4.04 | 4.05 | 4.03 | 4.03 | |
| 5 | 4.06 | 4.04 | 4.06 | 4.04 | 4.04 | 4.03 | |
| 6 | 4.05 | 4.04 | 4.05 | 4.04 | 4.04 | 4.03 | |
| 7 | 4.05 | 4.05 | 4.04 | 4.05 | 4.04 | 4.03 | |
| 8 | 4.06 | 4.05 | 4.06 | 4.05 | 4.03 | 4.03 | |
Small Block Chevy Casting Numbers
Small block casting date is located on driver side rear of block on flange forward of bellhousing.
Casting Date Example: E038 – (E = Month, 03 = Day, 8 = Last digit of model year (1978)).
Month: A = Jan, B = Feb, C = Mar, D = Apr, E = May, F = Jun, G = July, H = Aug, I = Sep, J = Oct, K = Nov, L = Dec
Based on this logic
Betty’s New Heart Casting Date: K181 – (K = Month of November, 18th Day, 1 = Last digit of model year (1991)).
Quick update as of 1/2/2023 I just brushed off the gunk that was covering the serial number and got a little surprise.
In the event that the Internet is correct this block is from 1975 ! So the stamped serial number is not as much a specific serialized block number as a born on date and location.
The assembly plants include:
- F for Flint (1955-1966),
- H for Hydramatic,
- K for St, Catherines, Ontario,
- M for General Motors in Mexico,
- T for Tonawanda,
- S for Saginaw Service, and
- V for Flint (1967 and up).
This block is stamped V1211TXA if you break it down
V – Flint Michigan 12 – Month December 11 – 11 day TXA- in table below data from here
| Engine Code | Year | Cubic Inch Displacement | Application | Engine Vin | Horse Power | Engine Vin | GM Body/Comments |
| TXA | 1975 | 350 | conv.cab | L LS9 | 165 | 4 | C-20 to 3500 |
Conclusion: No clue. The casting number says it was built 10 years after the stamped number says?!?
Crank Shaft
Manufacturer’s Part Number: 14088526
Engine Stroke (in.): 3.480 in.
Crankshaft Material: Cast iron
Engine Balance: Internal/External Harmonic Balancer
Rear Main Seal Style: 1-piece
Rod Journal Diameter (in.): 2.100 in.
Main Journal Diameter (in.): 2.448 in.
Balancer Bolt Thread Size: 7/16 in.-20
Crankshaft Snout Style: Standard
Notes: This crank does not have a pilot bearing.
The bearings run on these Journals. These are the sizes that have to me measured for the amount of wear when ordering new bearings.
| Cylinder | E/W | N/S | Diagnosis |
|---|---|---|---|
| When new | 2.100″ | 2.100″ | Passed |
| 1 | | | |
| 2 | | | |
| 3 | | | |
| 4 | | | |
| 5 | | | |
| 6 | | | |
| 7 | | | |
| 8 | | | |
| | | | |
