Disc brake with factory steel wheels?

[SouthernRodder]

Guys I need a little input please. I just inherited my grandpas 64 that I spent my entire childhood in. First thing I'd like to do is put drop spindles and six lug disc brakes up front. I really want to run the original steel wheels if possible but I mostly see folks saying that's a no no. I know I've seen someone on here who is doing this, I believe they had to make some mods to the caliper or mounting bracket or something. Could someone please verify if it's possible. I'd really appreciate any and all feedback.