its not too big of a drop
will i be ok on stock non sport shocks on a 03 sedan w/ 65k miles???
or will the shocks go out quick
and the drop should be about .5 - .7 drop right??

I think you may want the non sport coupe springs for your non sport suspension sedan to match the spring rates between the coupe and sedan, if i am not mistaken. But the .5" sounds right.

Absolutely not. Has nothing to do with how long your oem non sport shocks will wear and everything to do with the ride and drive experience. Non sport shocks simply do not have enough dampning, especially in the rear for use with coupe sport springs.

I would not ever run oem sedan sport springs of coupe non sport springs even though they are only 10% stiffer then your oem non sport sedan springs. I found that the oem non sport sedan has shocks that are noticeably underdampned. IMO, your best bet is to install the entire coupe sport suspension or a non sport coupe suspension.

I helped a sedan owner install Tokico D-spec springs and coupe non sport springs on his car. I used a tape measure before and after, we measured a .5" drop.