New Hemi Engine Swaps: How to Swap 5.7, 6.1, 6.4 & Hellcat Engines into Almost Anything

Have you made plans for a new Hemi swap into your classic car? Maybe you’re just curious about the process and want to know how much work is involved. Either way, New Hemi Engine Swaps: How to Swap 5.7L, 6.1L, 6.4L, and Hellcat Engines into Almost Anything has you covered!

Even casual enthusiasts are aware of how many people are swapping modern technology into vintage chassis. Successful LS swaps have been common for more than a decade. They seem to be everywhere among GM enthusiasts.

On the Mopar side, the new Hemi platform is now 20 years old, so plenty of salvage-yard cores are available. With the introduction of the new Hellcat in 2015 (as well as a more robust crate-engine program in recent years directly from Mopar), aftermarket manufacturers have recently seen the wisdom of making peripherals and parts to simplify the process of this swap. Suddenly, swapping a crate Hemi seems as achievable as an LS swap.

In New Hemi Engine Swaps: How to Swap 5.7L, 6.1L, 6.4L, and Hellcat Engines into Almost Anything, expert Joseph Hinds guides you through the process of turning your vintage ride into a modern street machine. The essentials are covered, including engine mounts, transmission crossmembers, headers that actually fit, and solutions for other common issues. Also covered are fuel-supply items (pumps and tanks) and engine-compatibility concerns (oil filter locations and oil-pan accommodations). Finally, the biggest concerns for most are the wiring, modern powertrain control modules (PCMs), computer controls, and fuel injection, all of which are covered here as well. There are even step-by-step instructions to fit a modern Hemi into an early-1970s-era Duster as well as a feature about programming aftermarket electronic fuel-injection (EFI) systems.

Now that the degree of difficulty in performing these swaps no longer requires a degree in computer science with welding certifications on the side, many are looking at their vintage Mopars in a new light. Whether you want to do this yourself, farm it out to a professional, or if you are just curious about how it is done, this is the guide for you.

Acknowledgments

About the Author

Chapter 1: Introduction to Gen III Hemi Engines

Chapter 2: Engine and Transmission Selection 

Newer Options 

Automatic Transmission Selection 

Manual Transmission Selection 

Chapter 3: Engine and Transmission Management 

Carbureted Gen III Hemis 

Ignition Options

Fuel Systems

Transmission Controls

Throttle-Body Injection

Factory-Based Systems

Multipoint Aftermarket EFI

Chapter 4: Engine and Transmission Mounting

Engine Mounts 

Transmission Mounts 

1973 Duster 6.1L Hemi Swap 

Suspension Modifications 

1972 Gremlin X 5.7L Hemi Swap 

Custom Engine Mounts and Motor Plates

Chapter 5: Fuel System 

Carbureted Electric External Fuel Pumps 

Calculating Fuel-Pump Flow Requirements

Mounting Considerations 

EFI External Fuel Pumps 

Carbureted Electric Internal Fuel Pumps

EFI Internal Electric Fuel Pumps

Fuel-Pressure Regulator

Fuel Lines, Hoses, and Filters

Fuel-Pump Controllers 

Chapter 6: Exhaust System

Headers

Exhaust

Chapter 7: Common Swap Concerns and System Upgrades 

Cooling Systems

Accessory and Drive Systems

Air-Intake Systems

Oiling System

Common Clearance Issues

Gauges and Instrumentation

Drivetrain Upgrades

Chapter 8: Supercharged and Turbocharged Swaps

Hellcat Engines

6.4L Engines

5.7L and 6.1L Engines

Superchargers

Turbochargers

Boost Control

Cooling the Intake Charge

Hot-Side and Cold-Side Plumbing

Chapter 9: Engine Management System Installation 

Alternator Options 

Battery Options 

ECU 

Source Guide

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