---
title: Is the BluePrint Engines BP35512CT1 Engine Discontinued and What Are Its Basic Specifications?
description: Basic specifications for the discontinued BluePrint Engines BP35512CT1 355ci small-block Chevy, including heads, camshaft, balance style, and seal type.
---

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# Is the BluePrint Engines BP35512CT1 Engine Discontinued and What Are Its Basic Specifications?

### ***Is the BP35512CT1 Still Available?***

**No. The BP35512CT1 has been *discontinued*.** While this engine is no longer in production, many replacement parts remain available through standard small-block Chevrolet service channels. What Are the Basic Specifications?

| Specification | Details |
| --- | --- |
| Engine Part Number | **BP35512CT1** |
| Displacement | **355 Cubic Inches** |
| Engine Family | **Small Block Chevrolet** |
| Block | **350 Chevrolet, 4-Bolt Main** |
| Rear Main Seal | **1-Piece Rear Main Seal** |
| Dipstick Location | **Passenger Side** |
| Crankshaft | **Cast Iron** |
| Balance Style | **Internal Balance Front / External Balance Rear** |
| Pistons | **Dished Pistons** |
| Cylinder Heads | **Aluminum Heads** |
| Head Casting | **H8002DD** |
| Camshaft | **Z103 Hydraulic Flat Tappet** |
| Connecting Rods | **5.700" I-Beam Rods** |
| Fuel System | **Carbureted** |
| Oil Pump | **M55HV High Volume** |
| Valve Train | Hydraulic Flat Tappet |
| Minimum Dyno Rating | **375 HP** |
| Minimum Dyno Torque Rating | **400 lb-ft** |

 What Cylinder Heads Were Used? The BP35512CT1 was equipped with:

- **H8002DD Aluminum Cylinder Heads**
- Hydraulic flat tappet valvetrain
- Stud-mounted rocker arms

 What Camshaft Was Used? The BP35512CT1 utilized:

- **Z103 Hydraulic Flat Tappet Camshaft**

 Build documentation specifies:

- **Cam must be degreed**
- Intake centerline target: 
    - **106°-107°**

 What Rear Main Seal Does the BP35512CT1 Use? The BP35512CT1 uses a:

- **1-piece rear main seal**

 This is an important distinction when ordering replacement crankshafts, oil pans, flywheels, flexplates, or rear seal components. What Harmonic Balance Configuration Does It Use? The crankshaft is:

- **Internally balanced at the front**
- **Externally balanced at the rear**

 Customers should verify flywheel or flexplate balance requirements before installation. 

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