I wouldn't trust your cam card as far as I can throw it, which means I wouldn't trust the cam either . Either cam lift or valve lift as written are incorrect. Card says 1.5 rocker ratio. 300 x 1.5 =450. 290 x 1.5 = 435 . 300 x 1.6 = 480. 290 x 1.6 = 464.
