1.19.2 World Gen Datapack

im looking to make a datapack to adjust the distribution of a few ores and stone types - specifically, id like andesite and diorite to generate in much larger, but rarer patches just to make it more convenient to get lots of these blocks as a builder+keep my inventory less cluttered haha
ive gotten it to work actually! now my question is, how can i make andesite, diorite and granite generate in veins larger than 64?