Picking the right gears for 1/4-mile

Well I do know it could use more carb, it only has a 625 cfm AFB right now. I took it to a test & tune night at bandimere and it ran a best of 93 mph trap speed at 5500 ft. elevation with crummy tires and stock gears. In fact 4.10s might be easy to get, my buddy's old dodge van supposedly has them.