New dash pad in the sun

[truckin 79]

I am putting AC in truck and not sure if I should buy a new dash for truck since I have to add AC vents to existing. My current dash has about three cracks in pad but still looks good for its age. My truck sits in the sun, well when not in use I have a cardboard sun shield up. For you guys who bought a new dash and had your trucks sitting in the sun, how has it held up, how soon/did it crack. I was going to buy a USA1 dash since they have the metal backing but would be mad if I spend 600 dollars just to have it crack in a couple of years.