69 Camaro coil over help an tires

[69blackwhss]

I have a stock 69 Camaro besides brakes an rear end am thinking about going coil over maybe by air ride don't know just yet but what size of a rim an tire could I run on the rear if I go coil over 4-link on the rear with out mini tub's. An what if I do mini tubs? An what other coil over 4-link kits out there that r good for 69 Camaro that don't break the bank? An I'll be doing the whole car coil overs if I get a kit....

Thanks jason