Connecting rod "offset"?

Krooser said

Since the original application was a Chevy RO7, and my SBM 383 journals are wider than the width of the big ends when installed, I'll make some washers to fit on to the piston pins so the rod will be centered on the piston...

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I can't say I am sure on this idea.... so you are using the pistons & pin bosses to control the location and side float on the rods? Doesn't that put abnormal forces on the sides of the pistons? Never heard of such a thing... but I sure haven't heard of everything....