the picks u are referring to not posted by the O.P. and he is replacing the connecting rods. I have used tru arcs in pistons machined for tru arcs for 40 years without a single problem-like chrysler used in the 340 and hemi
I haven't personally, others have, had any problems with the classic tru arcs either, but I know a better design when I see one and have used spiral locks for 20+ years without a failure.