LT1/LT4/LT5 Aluminum 6.2L Block, Upgraded & Assembly Ready

MACHINED LT4 BLOCKS IN STOCK GM's aluminum LT production block has proven itself to be a strong performer.  We see this block as being able to reliably handle over 1,000 hp.  That could not be said about its LS predecessor.  We offer this block fully machined, upgraded and ready to assemble with a diamond CNC hone finish appropriate for your application.  Our state-of-the-art CNC equipment provides a level of precision far beyond OE. All blocks are individually serialized on our 4-axis CNC for traceability. We install premium Dura-Bond cam bearings and replace the OE main bolts with P1 main studs. The use of P1 main studs is a major upgrade for several reasons. Who knows where the OE fasteners came from? What is their metallurgy? P1 Manufacturing makes these studs from E190 steel alloy in Rogersville MO. "Studs provide the ability to obtain much more accurate torque values because they don’t twist during tightening as bolts do. Because studs remain stationary during nut tightening, th