Finally drivable after 9 years... help me decide what comes next

It's been a loooong time coming, but she finally moves under her own power. I can't drive very far because the 4 mismatched tires that I rounded up to be able to move it are in very bad shape. So, I need new tires obviously, but I also need to replace the rear axles since currently it has BBP in the front and SBP in the rear. So, my options as I see them - Run mismatched wheels and try to find some cheap used tires for the time being. Go ahead and swap the axles out, and get some good tires to run with the new wheels I will buy. When I do buy new wheels, I was thinking of going 15s instead of 14s. Thoughts about that? I will be running rallye wheels. I have replaced the front drums with a later a body disc setup. Thoughts? Oh, its great to be back! :thumleft: