1960 GMC 305 v6 with SM-318 Flywheel P/N?

[AngryPirate]

Anyone got a rock solid P/N for one of these?

I see conflicting numbers when I enter my truck on different sites.

http://www.partsgeek.com/catalog/196.../flywheel.html

https://www.amazon.com/AMS-Automotiv.../dp/B000EQFI02

http://www.rockauto.com/en/moreinfo....341009&jsn=424

It appears the AMS/Rhinopac 167654 could be the correct one, I just was wondering if anyone has done this recently and knows for sure.

Thanks!