Need A body coil spring recommendations

[tt69camaro]

I have upgraded my shocks, sway bars and rear control arms. The coil springs are next. Looking to go with a 28" tall rear tires as wide as I can fit in the stock wheel wells. I also want to know how big/wide of a front tire I can go with? I will be going with a set of 18" rims. What front/rear spring combo would you go with? I have a 70 chevelle. Do you have any pictures of similiar car set ups? Thanks, Chris