D100 Pickup question for you:

Same problem with my 71 D100 /6
Love the low end granny gear but would also like to have a "little" bit more high end.
Has factory 8 3/4 with 3.23's and was thinking about converting to 2.76's.

Would give me a little more top end and sacrifice low end.

Any thoughts/comments or experience regarding doing to my truck or any other same vintage mopar with a /6?