mcpe behavior packs
If installing Vortec heads on your 86 blazer you will use your existing pushrods. Something that everyone is forgetting about is that (if i'm not mistaken) all Vortec heads have a round pushrod hole so you must use the GM self aligning rocker arms or some aftermarket self aligning rocker arms otherwise the rocker arm will move all over the tip of the valve. The oem stock vortec head rocker must be checked for rocker slot to rocker stud clearance at max lift. If it clears (.030"). I think you are good to go. Otherwise get longer slot self align rockers or grind the radius of the slot in the rocker a bit longer. Longer, not wider. Small Block Chevy Aluminum Roller Rockers. Self Aligning, 1.50 ratio, 3/8" stud (23 degree stock/aftermarket heads). Just released: KMJ Maximum Race Series Self-Aligning Aluminum Rockers. Made from high strength 6061-T6 aluminum extrusions, each piece is precision CNC machined and finished by hand to ensure that our customers receive the very best KMJ has to offer.