Replace Rims and Studs...for the correct combo

I have a 1974 Plymouth Duster with 20 inch rims, the car looks pretty good for me and I deftly don`t care about who thinks it`s ridiculous or wherever because enjoy the old school style, this way you don`t need do waist your time talking unnecessary things about my car ok?

For who is able to answer my question below I appreciated , you are helping me a lot !!!

I have 2 issues to fix !

1 - I need to replace the original studs for the long ones because I use wheels spacers adapters....the problem I don`t know what is the best way to put the new studs since they are long...some clues? Do I need to work in the rear axle? The car has Drum brakes ,,,

2 - I need to figure out what the best rims to put in the car....I want to replace the currently one , for other model with the correct backspacing for this way I remove the wheels spacers adapters...



Thanks for help !!!