Best Gearing for 8 3/4 Behind 1970 Duster 318

I don't get this gear for the highway, every time someone ask about gears, be fine if the OP said I'm gonna do a lot of highway or highway is important to me, he said the odd time he might do a 30 minute jaunt down the highway, I'd go 3.73 gears a 318 will love them, 3.55 ain't gonna shave off that much highway rpms. Your gonna feel the increase of a full ratio from 2.76 to 3.73.