ball joint and idler arm

[RoamingRose]

So, I'm going to replace my front upper ball joint, idler arm, and both inner tie rod ends. I was wondering if there is a difference in left or right upper ball joints and if there is a difference in the passenger and driver side idler arms?? It's a 95, 4cly 4wd T4R. And if there is anything else that I need to know about replacing these parts. Going on a 2200 mile road trip next week and need to have this done beforehand. Also, how difficult is it to replace odometer cable and can I just drive it broken that far??