GM LM4 Classic Truck Frame

Inside GM’s Gen V LT engine family: history, tech, and performance of each LT engine option available.

Looking to swap the venerable LS engine into your hot rod, muscle car, or classic truck? Take a look at our detailed identification guide for Gen III/IV LS engines before you hit the salvage yard or swap meet!

If you're ready to swap an LS engine into you '73-'87 Squarebody Chevy or GMC truck, here's a guide to get you started and a parts list to help you get everything you need for your swap.

How to plan and execute a LS swap into any 1973-1987 Chevy/GMC K10 pickup truck.

Small block Chevy V8 or the modern LS V8? Which one comes out on top as the best engine to swap into your ride?

Knowing popular engine dimensions and weights are critical to a successful engine swap in your project vehicle

Learn how to swap out an LS engine with a modern fuel injected engine into a hot rod for added horsepower, fuel economy, or throttle response. View a list of parts and helpful tips to complete the installation.

Here's our attempt to do the impossible: pick a favorite GM truck design!

A new print and digital magazine about all things classic truck and more, brought to you by some familiar names.

In this Tech Tip, John answers a customer concerns about adding additional drop to his 1960-1972 Chevy truck.