6.6 Duramax Engine

Decode, ID, and upgrade your GM 12-bolt rear end. Learn axle specs, gear ratios, and best performance parts upgrades.

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.

GM’s 10-bolt rear axle has been around since the 1960s, here’s how to determine if your junkyard find is worth taking home

All you need to know about racing a 602 GM crate engine and the necessary parts to make a race ready engine.

Tips and tricks to pull the most from your GM 602/604 platform.

Learn about GM alternator identification in our guide. We cover GM 3 wire alternators, 1 wire alternators, and externally regulated so you know what to choose.

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

It's alive! Our 1968 C10 truck project is one step closer to our first drive. In this episode, our old truck finally comes to life with a cammed junkyard LS.

Speedway Motors Product Manager Jeff K. talks about how to really make your engine bay stand out from the crowd with just a little patience, and some Speedway products.

Our project '68 C10 had some pretty rough sheet metal. In this episode, we go from a scary, rusty mess to a complete cab ready for bodywork.