I bought a NOS 284-484 cam at a swap meet years ago. I asked the seller what the deal was with the new cam and lifters. He said he was going to install it in his 360 in a big Dodge work van. We're in Nebraska-it does get cold here-I told him that he would have been sorely disappointed, he thanked me and sold it to me.
You fellas in the middle of the country see the most extreme temperatures changes. Summer is a sizzling hot frying pan and winter is a Mutha-F’er bone chilling event.
That cam you purchased from that guy was a good move for both. You’re 100% right about that cam in the van. He would have been pissed and cursed a lot. That’s a “Wrong Cam” application if I ever seen one.