Splayed main cap set for 6.2/6.5 engines
Set of 3 center caps provides increased rigidity to the bottom end of the block and shifts the stress off of the center of the webs. The outer bolts are set at an outward angle and tie into the base of the web where the strength is. The old holes are simply abandoned by filling with threaded rod or sawed off old bolts.
The installation of these caps will require machining of the "registers" in the block out to near the pan rails, and a full line bore operation along with boring and tapping of the splayed holes for the outer bolts. Hardware is provided in the form of studs for the center holes on 5 caps, and bolts for the outer holes on the center 3 main caps.
"I believe that the key to survival of the blocks on these engines is rigidity. These caps are taller, longer AND thicker than the OE units, providing a tremendous improvement in strength and rigidity. This operation should only be performed by an experienced machinist, but is a common operation on Chevrolet gas engines used in HP racing applications." - JK