Motorhome 440's... factory seconds?

Alot of motorhome engines were factory reconditioned industrial blocks... there is a service bullitin that exists on the web somewhere stating this...

I have a 30,000 mile 72 440 out of a "one owner" 76 motorhome that has never been touched since new... no repairs!!!

This 440 has helicoils in both heads and the valve springs are random with turquoise and blue overspray...and the block being 4 years of build date...

The motorhome was a winnebago.