[AussieinNC]

I will assume you dont have access to a press and spacer plates...

Its a simple fix...

I would take the piston / rod assembly to an engine shop and have them press the pin deeper into the rod...from the pics, it only needs about 1/8" to 3/16" to center the rod on the pin in the opening.

I know a lot of shops never heat the rods, they just press the pin directly into the rod....WARNING....dont try that at home unless you are very experienced....

The rod should be centered in the opening in the piston and each end of the pin should be roughly flush with the pin bore in the piston skirt.