8 3/4 vs 8 1/4 weight

I don't have exact weight differences but Steve Mags did a side by side comparison of a D60 vs a 8.75 in his Hemi Dart with everything being equal in both rear ends (gear ratio, brakes...) he found that the "extremely heavy" D60 was only about 50 lbs heavier than the 8.75 and actually ran equal 1/4 mile times. Now let's just pretend that your 8.75 weighs 50lbs more than the 8 1/4 (I think the weight difference will be less), I don't think you'll notice anything significant between the two. You would be better off trying to find 50 lbs somewhere else if you want to lose weight