5.7L LS Long Block - 750 Series

Our street series 5.7 long block is the logical next step up from the base 5.3. We utilize the same 5.3 core and bore the block to 3.898” and use a flat top LS1 piston. Taking the bore from 3.780” to 3.898” really wakes up the platform. This long block is a good choice to replace or upgrade that tired stock 5.3 in your ride. Whether you are wanting stock idle for momma’s grocery getter or some nasty chop for the hot rod, this long block build can get you there on a budget. Take a look at the camshafts we recommend for this build or let us know what camshaft you want in yours. If you plan on adding a power adder down the road you should consider upgrading to one of our 1000 Series combinations with forged rods and pistons. Naturally Aspirated with a small cam (214/220, .525/.525, 107 LSA) this combination made 496HP/479TQ and with the upgrade to the FED Boostline Cylinder Heads made over 500HP. Dyno Graphs are below. With a larger cam and/or power adder selection these heads will really provide great HP/Dollar! Build Specs: GM Iron 5.3 Block GM Stock 5.3 Crank GM Gen4 Stock Rods ARP Rod Bolts 4032 Forged Pistons Performance Ductile Moly Rings set: 1.5, 1.5, 3mm Stock Replacement Lifters and Trays Single roller timing chain & gear set Cloyes timing chain dampener, also added to all gen3 builds Pushrods, one piece - hardened, 7.400” GM Rockers with BTR trunnion kits installed GM 706/862 Heads, remanufactured - New springs & seals Clevite Main and Rod Bearings Durabond Cam Bearings New block plug kit and barbell New Oil Pump New Head Bolts Fel Pro Gaskets Throughout MLS Head Gaskets GM stock valve covers GM stock truck oil pan and pickup tube GM stock front cover GM stock valley cover GM stock rear seal housing