Walter, I assume you mean low pH. It would be unusual to have depleted clay soils in the south supporting pine that are not acidic. The good news is blueberry likes acidity, but needs lots of organic matter to do well. Do that's on the to do list- figure out how to incorporate organic matter.
Apples are tougher. There are some rootstocks that do ok in clay, mine are semi dwarf. If you are at the top of a mountain you may not have an issue with cedar rust which is awesome. Often orchards in the south are on mountains for that and extra chill hours. The important thing is to prevent the
roots from being too wet.
I have apples above swales, at least 2' vertically above. The swales
feed into a hugelmound that is planted in blueberry. The apples get a limited amendment in their holes to increase infiltration. I try to transfer the water from the apples to the blueberry. It takes a ton of organic matter to make the hugelmound. I use a skid steer. Get one with tracks if you get one. I get free
wood and chips by the hundreds of yards. You might find another
carbon source. But blueberry really needs help in clay.