http://www.arp-bolts.com/Catalog/Catalog.html WATCH VIDEO
http://www.youtube.com/watch?v=uTpRfREYa9Qthe wav-loc bolts were designed to remove the potential for stress risers that knurling the outer surface of the bolt can produce, they are a stronger design made with better steel,and less prone to failure.
that being said, if your re-using stock connecting rods the knurled arp bolts are already stronger than the stock rods, so theres not much gained going to wav-locs
your far better off going with the cap screw style rods that have the 7/16" rod bolts as they have a larger cross section, and the rods themselves are of a better design with stronger materials in most cases than anything the stock connecting rods can be prepped to accomplish
aftermarket rods are cheaper and stronger than reworked stock rods in most cases
the typical stock chevy rods weak point is the rod bolts that may stretch or caps, held by the rod bolts, the BETTER ARP rod bolts (L19 )are typically at a minimum 50%-100% stronger,than the stock bolts, if the same diam. is used, going from a 3/8" diam. to a 7/16" diam. adds about a 18% additional cross sectional area, significantly adding to the strength, but its rather silly to refurbish the stock 3/8" bolt BBC rods, in my experiences building BBC engines ,when there are far stronger aftermarket rods already built with ARP cap screw rod bolts and made from 4340 forged steel that cost about the same as all the work typically costs to bush,the small ends, refurbish,the rods,add ARP fasteners, polish, balance those rods and still have an inferior, and weaker rod.
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