The CC site says yes they both oil & 1.79" seat hite on the Mopar/AMC one & 1.63" on the std SB Mopar one. If they are the same ex for the hite (at least from the descrip it sounds like they are) then I would mockup with a junk lifter with the cup at those heights (I JB welded a hyd one for checking) & Hughes offers an adjustable one for checking (He may rent it out) & see which one gives the best valvetrain geometry. EDIT & I set (JBweld) the cup hite at whatever preload my setup has during mockup, maybe a bit OCD there but its my meticulousness