Well, stick around because we'll be breaking down the best V-8 crate engine you can buy right now. The Best Value LS3 Engine You Can BuyChevrolet modern LS3 crate engine (standard), closeup of block ChevroletThe 6.2-liter Chevy LS3 V-8 is by no means a "cheap" or even affordable engine in the grand scheme of crate engines. The front 3/4 view of a BluePrint Engines Pro Series LS3. Chevrolet PerformanceA cast-iron "LSX-style" LS3 block weighs about 60 pounds more than the aluminum variant found in the factory LS3 engine. Find more Chevrolet vehicles in our marketplace Shop With Smart SearchThe front 3/4 view of a fully-dressed BluePrint Engines Pro Series LS3.