Wheels and tire size for lowered 67 camaro?

[Drnelson]

I lowered my front 2" with drop springs and also 2" with drop spindles. The back is lowered 2" with hotchkis leaf springs and another 1" block. Been looking for tires and wheels but need help with size and backspacing etc. Would like 18's or 19's in back and 18's up front with as big a tire as can fit. Any help would be great...