I have two sets of rods and pistons that were said to be 308 when I bought them on eBay. They measure out the same as above. One set of pistons measures 3.80" and is a long heave piston with 4 rings. One on the skirt. The rods have # 5303906 The other set has pistons that measure 3.85" and are lighter and shorter. They have 3 rings. The number on them is 303906 a diamond 24. They all have bearings in them that measure about 2.1".
