I believe the factory rim is considered to narrow for 12.5. If you do mount them on a factory rim you would still probably need to run a spacer so it wouldn’t rub when turning. Height wise you would be good.
This is my sport with the mopar lift and 3/4in spacer in the front. I’m running 315/70/17 tires. The mopar lift on a sport is closer to 3inch. Another good option would be a rubicon take off suspension with a 3/4 to 1in spacer in the front.
Has Nissan ever decided on a release date for the new frontier? If it actually looks like this then that would be a big leap forward for them after having the same body style for what 15-16 years. I had a 2015 and 2019 model frontier and loved the 4.0. The truck for the price was hard to beat at...