edelbrock magnum head valve springs

Good stuff above as far as carb tuning & springs. But if I recall from others that used that engine, that cam was pretty much done around 5500? I know the extra lift with your 1.7 rockers would theoretically give a little more top end, but I believe the low lift numbers "under the curve" is where the power came from with that crate. I think you may need to be satisfied with the performance as is, or maybe look into a different grind with a similar lift and a little more duration while keeping a fairly wide LSA for a broad power curve.