Chevy 4.3 Engine

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

Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. We’ll help you determine the correct flexplate for your Chevy engine in this buyer’s guide.

Learn correct spark plug firing orders for SBC, LS, Mopar, AMC, and Ford V8s, and learn what the correct firing order means for performance.

Concerned about a transmission swap? Our engine transmission compatibility checker will help confirm what you need to make it happen.

Decode small block Chevy engine suffix codes and block casting numbers with our SBC decoding info guide. Learn how to find and decipher your small block Chevy engine codes quickly and easily!

Identify SBC heads using casting numbers, style tips, and year-by-year guides for your small block Chevy engine projects

Learn the differences between Chevy 2-bolt and 4-bolt main blocks, how to ID them, key years, and whether a 4-bolt is worth it for your build

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

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!

Take a look at a few of the rare and wonderful Chevy engines in the Museum of American Speed!