The blaster piston(573mo6800) was/is the piston for a 115mm rod. Our new 11901mo6800 is the new option for a long rod application, whether it be a 4, 7, or 10mm stroke with the 115mm rod.
trinity or cp now has a 9768mo6800 piston that is for the 110mm rod, a standard pin height 68mm piston but retails for $130. Same with wsm they make a std pin height piston for the same application and price. These pistons would be used in a 4mm stroke with 110mm rod crank or more commonly used in a stock stroke 110 rod 392 cub. Both the 9768 and wsm are fine pistons, Ive used them both but price and availability are their down falls.