Post mini tub tire combos?

I have 295 50 15 on the rear of 67 dart
stock axle housing custom 10" steelies with dog dish caps with 7 1/4 backspace

on the front i think they are too small for my liking but they are 185 55 15
but i want to switch them to a 25 or 26 inch tall tire
At moment cant find photo on my phone or computer