2.76 vs 2.94 gearing
I went from 2.93 to 3.23 there was a slight improvement in 1/4 mile.
But regular driving I do not notice any difference.
Rear end swap is pretty straight forward and easy so go for the 2.76 and if you end up not liking it there are always 7.25s that come up for free or 100.00 bucks.
Or save up to do an 8-3/4 swap.