I recently purchased a rebuilt SBC from a local shop. I ordered it with a camshaft with a lift of .454, why is it that when I measure the lift of the hydraulic lifters, they only lift out of their bores about .300? Does this mean I got the wrong cam? Does any SBC have a lift of only .300? Or is there something I'm missing. I notice that if I divide .454 by .300 I get 1.5, which I believe is the ratio of standard chevy rocker arms.
Is the proper way to measure lift, to multiply the distance the lifter rises out of it's bore, by the rocker arm ratio? (.300 X 1.5= .450) This would give me approx .454