I'm in the process of moving my 51 to a S10 frame. Then I'm adding a 350/350 with a 700r4 tranny behind it.

I need some help with picking a rearend setup. Some people tell me to go with a 9 inch ford. But I dont know a lot about rear end's to know if this will work. Also does the 9 inch rear end come with different gear setups? If so , what is a good ratio for a good road truck. I plan on taking long road trips with this truck and I want to get good gas milage. But I also want it to be strong enough to handle whatever I throw at it.

Other than the 9 inch ford ,what other setups/gear ratio's should I think about?

Thanks
Rick