72 dart w/17" wheels. What problems?

Ok, i was talking to a guy tonight that has 3.23 in his road runner, he says 3.91 will be no good on the highway.

I was set on 3.91 but now not so sure.

Other fourm members on here said it should be no prob....

3:91 gears suck big moose **** on the highway.. even with a 28" tire... a 3.23 gear is a great all around gear.. everything is gonna be a compromise somewhere along the way.. figure out exactly what you want in the end and build towards that,