disk brake conversion kits
 

I happened across an eBay seller called Tomsclassics that is selling disk brake conversion kits for 1955 through 1964 big Pontiacs. They're apparently part of Auto City Classic in Minnesota; I knew they sold window glass and replacement gas tanks, but wasn't aware of the brake kits. https://www.ebay.com/str/tomsclassic

I reached out to them, they move the wheel a full 5/8ths of an inch. Which seems like a lot to me.

The price is solid, but I want to put my 62 on airbags and drop it down real low. So I need all the wheel tuck I can get.

They also told me what the replacement calipers and rotors were. I cant remember off the top of my head but I can go through my emails if anyone wants that info.