New to Dodge world, Need help with spindles

I jus swaped from the chevy world to the dodge world. bought a 68 dart to play with. i am wanting to change to front disc brakes but am having a lot of issues finding the right spindles and dont want to pay a grand for a conversion kit. everything i find is for mid 70s. I know this is probably a dumb question but i have been wrapped up in my 68 camaro for the last 10 yrs and dont know squat about dodge parts. Any help would be appreciated.