The lobe profile and rocker ratio has the biggest influence on how much spring you can get away with(along with how high you need to rev the motor).

For a street/strip car with a roller, there are certainly profiles available that will work and live just fine with less than 280/680.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads