Fast231, if the lift of .511-.519 is based on a 1.55 rocker that would put the lobe lift at .330 and .335 making the lift with 1.65 rockers .544-.552. If the lift was based on a 1.50 rocker that would put the lobe lift at .341-.346 making the lift with 1.65 rockers .562-.570. Double checked my math as I have no calculator.