I do not recommend using the stock springs , , valve to piston clearance is generally good to .530 lift approx but it is worth checking clearance
the K 54 or K 54 / K 56 may work better , the K 56 does work well & has a higher powerband than you may want in a mild application as you stated , yopu can discuss your needs with Engle & they will custom graind a cam as well
The other option is VooDoo from Lunati these cams work well too , but a custom grind may be harder to get