Wheel alignment problems help!!

[69blackwhss]

I don't know if this is the rite place for this r not. If not let me know an I'll try there.. I have a 69 Camaro with 17 inch wheels an when I have it wheel alignment done they use stock numbers! An I wear the front tires out way to fast, the wheels ride on the inside of the tires an I need new tires now an I still have like 60% life left on them!! Does anyone know what numbers to put for the wheel alignment? They guys said if I had numbers to use they would do it but If not then they got to use stock numbers to alignment by! So any help would be great guys am tried of buy front tires befor I need to.