Wheel Adapters ?? YA or Nay

HAHA Slant 6,

I have 2 other cars for daily drivers, this is just a fun project, my first Mopar, its a 75 duster slant 6 225 with stock everything! I just stripped it down to steel this weekend, ahh i love seeing the true american steel. And am getting some minor body work and all the rust cut out around the wheel wells and replaced. I just cant find any 5 on 4" wheels here in California that arent going to cost $1000 any suggestions?