Science Fiction question: How could Venus be made cooler?

Lets suspend our `scientific understanding of reality for a moment. Suppose the planet Venus was more Earthlike prior to WWII, about which time its core stopped spinning and it became the Hell it is today.

Venus, even with a spinning core and shielding from Solar winds, even an Earthlike Venus, would be about seventy degrees hotter worldwide due to its proximity to the sun. Instead of temps in the seventies and eighties they’d be about 140 f.

So, how could we make Venus, or an Earthlike planet in Venus’place, more pleasant for Earthlings in temperature and climate? How could an Earthlike Venus, closer to the sun, be made as cool or slightly cooler than Earth?,