Need Help not sure how this works?

If i choose Aldor or Scryer then get Exhaled (cant spell lol the highest you can get for Reputation) can i then switch later to the other side? beacuse im trying to get all the Blacksmithing Plans and there is also some items i like that they both have, so is it posible to switch even if you get to max Reputation with one or the other?

It is possible to switch later on. Near the ramp down to Lower City (closest to the Aldor Bank) is an npc that offers a q to switch faction. I never tried it, but I think it'll be a pain in the ars to work your way up from 36k hated faction.

Unless you would die because of not having 4 bs plans, I wouldn't put all that effort in gaining those plans. They aren't that special and they don't bring tons of gold.

the fastest way for you to get hold of those 4 plans might very well be starting an alt and let that alt get exhalted with scryers. i actually think that would be faster than switching factions on your main.