370ci Long Block for Naturally Aspirated Applications

Quick Delivery Item - Normally in Stock This digitally remastered 370 cubic inch LS long block delivers a lot of bang for the buck. Our CNCs have machined these seasoned GM block, crank and heads to far beyond their original condition. Pairing these parts with superior quality aftermarket components allows us to pull out 630 horsepower on pump gas at a budget friendly price.  The 6.0L iron GM blocks are bored and decked on our 4-axis which boasts a precision of 0.0002" and 1/1,000th of a degree. We also engrave and serialize the blocks here.  Their last machining step is on our CNC hone where the perfect surface finish is created to seat the rings and keep them lubricated. The crank is polished and rebalanced for its new forged rods and pistons. The rods may be Callies or Manley while the pistons are Manley or Diamond depending upon availability. The heads are GM LS3's that have been milled flat and then CNC ported on our 5-axis mill.  The final machining operation is the valve job/bo