G-Body Pontiac 400 Cylinder Heads

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!

Learn how to re-build a junkyard Small Block Chevy. A step-by-step guide on how to select a SBC, machine the valve guide bosses down, and what parts to use to upgrade to your personal liking.

Need help selecting the best cylinder head gaskets for your engine? Click here to learn the differences between copper, steel shim and MLS head gaskets. Plus install tips!

The 4.8 LS engine is a salvage yard bargain vs the typical 5.3 or 6.0 LS and can still make great power for your LS swap needs.

Learn about the power behind the G-body platform and the steps to upgrade a 7.5" bolt rear end to a 8.5" to withstand high horsepower. See how to change the differential fluid and install new gaskets.

Need a little help Identifying GM Body Styles 1964-1972? Click Here!

Heath P. tells his story on how the passion for 'hot rodding' was instilled in him by his grandfather. From driving tractors on their family farm to becoming a Ford family, you are in for a good read.

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.

Learn about the specs of the V8 Ford Flathead Engine. Check out these Flathead firing order diagrams and torque specifications chart created by the experts.

Engine Cylinder Numbers