I just ordered the compcams 218/230 with .495/.510 lift blower cam. I'm going to be running 6lbs from an S-Trim with ported stock heads and 1.6rr's. What valvesprings should I use for this combo. I was told that I should look for 140lbs of seat pressure. Is this correct? If so, what springs will accomidate this seat pressure and lift with the 1.6rr's?