3.23 or 3.55 Behind a 318
2.94 is a good compromise gear
still very good on extended highway drives but more grunt than 2.76
It was the default gear in 1966 8 3/4 so there are a LOT of them out there
355 is not terrible on the highway.
very noticeably easier than 3.91
...and again noticeably more grunt than 2.23