Don't quto me, but im thinking that the springs was 265 close and over 700 open. I had the 5/16 indy pushrods. I told my head guy that i wanted a spring to be no more than 200 close. But he did something different, as i found out in the dyno shopwhen they took her apart. So springs was to hevy fir the pushrods which bent. Which didnt open the valves all the way. Which read false boost. That also blow an head gasket which the hugh boost level in the cylinder that the valves wasnt opening.