Well now, not sure it was a junk motor. I've had pretty good experiences with Chryslers under whatever label. But this is an OMC forum....
Decals appear to be nicely done, and condition of the boat seems good. I had a 15' Chrysler, and needed work because of water intrusion under the floor -- any of the old hulls would be subject to that. That motor may or may not actually be a 75. The Chrysler line had many hp designations over the years.