You should be going to 5.13 for 33’s.
A 5-speed 4 cylinder YJ came with 205/75R15 and 4.11 gears. The nominal diameter for that size tire is 26.33”.
In stock form: 70 mph - 3121 rpm
33” tire comes out to a nominal 31.5”, on average
70 mph:
4.88 - 3096
5.13 - 3255
So 4.88 will actually still be worse than stock, and doesn’t even fully get back to the stock final drive ratio, much less make up for the heavier tires. 5.13 will make up for it a little bit, and will have a slightly lower ratio than stock.
5.13 is the way to go.