489 vs. 741

any 8 3/4 case is an up grade from a 8 1/4.
My 8 3/4 has a 391 the 8 1/4 I think was a 291 it was out of a 6 cyl auto car for me it was geared to high so instead of changing gears I just bought the 8 3/4 I picked up a 9 1/4 from a Cordoba cost was to high for cut down and new axles