I was bowling league tonight and came across a really nice AMF ball on the rack, a King Cobra!!  This ball was great in its day, a reactive Cobra, and I remember this thing used to carry great!  The span is identical to mine, so  am going to change the slug and inserts, and give it a resurface.  If you guys want me to post some pics when I get the resurface done, let me know and I will put them in here.  What a find on a house rack!
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MainePBA
"Power tends to corrupt; absolute power corrupts absolutely." Lord Acton