1969 Chevelle coil springs help

[69nut]

I have a 1969 chevelle SS survivor car and need to replace the coil springs front and back because they are sagged and leaning, it came with standard springs (still have the tags on them). I would like to bring it back to it's normal stance. I was thinking of going with Eaton springs of detroit heavy duty but not sure if it would sit right . My car is 350hp, auto, NO a/c, smog, NO rear sway bar and stock rims and tires. To me stance is everything.

Let me know you opinions or experiences you have.
Thanks Dennis