Can anyone give me info on these?

Jadaharabi said

I thought it was a kick down for a truck . They use a one piece rod and a car uses a 3? piece set up I believe.

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70 AAR & T/A 340 Six Pak inc some 440 Six Pak E & B body used one piece KD rods and one piece rods where used in the mid 60's already in cars just depends on the model. If the OP provides larger pics i and many others on this site will have a better idea what it is.