Racing Use Only, Not Legal for Road Use Run the same 427 CID re-sleeved Gen 4 long-block as Cleetus McFarland's savage "Leroy" C5 Corvette that was the FIRST GM six-speed manual vehicle in the 7's! This long-block is built for boost and ready for some serious power and made all of the bald eagles for Cleetus' epic 7.82 @ 176 MPH pass! We have dubbed this engine "Leroy 1.0" since "Leroy 2.0" was upgraded to a GMPP LSx 6-bolt iron block. The full specifications of Leroy 1.0 are listed below:
New TSP Re-sleeved Gen 4 Aluminum Engine Block with Darton Stepped Sleeves TSP Forged 4.00" Stroke Wet Sump Crankshaft with Your Choice of 24x or 58x Reluctor Wheel TSP 6.125" Super I-Beam Connecting Rods with ARP 2000 Rod Bolts Wiseco 4.125" Forged Piston Set with -20cc Dish Wiseco Upgraded HD Piston Wrist Pins Wiseco Steel Top/Napier 2nd Ring Set ARP Main Stud Kit Precision Race Components 237cc Aftermarket Cathedral Port Cylinder Heads TSP/PAC .700" Dual Spring Kit w/ Titanium Retainers TSP "Bald Eagle" Turbo Camshaft for Stroker Engines Athena HD Head Gaskets w/ Stainless Steel Fire Rings ARP 12-Pt. Head Stud Kit GM Rocker Arms w/ TSP Trunnion Upgrade Kit TSP Hardened Pushrods Johnson 2110R Lifters 12 Quarts of Driven Racing Break-In Oil Complete Set of TSP Windage Tray Spacers
This engine combination was built for Leroy's twin-turbo setup with a goal of supporting up to 1,000 RWHP with ease. Complete with bald eagles and a healthy dose of 'murica, this long-block is ready to do it for Dale! Cleetus definitely pushed this engine to the limits making well past the 1,000 RWHP mark, so if you plan to do the same we do recommend upgrading to 1/2" head studs. We also stock all of the GM and aftermarket bolts and gaskets to complete your engine build!
The optional LS2 conversion package will be required if you are installing this engine into a vehicle that was originally equipped with a Gen 3 engine. The LS2 conversion package will include the following items: LS2 valley cover, set of 4 LS2 lifter trays, cam sensor extension harness, knock sensor extension harness, LS2 timing cover set, and Rollmaster LS2 single-roller timing set.