Have a 390 z code 63 500. Does the z code 390 come with solid lifters? The reason I ask is it has adjustable rocker arms. I am familiar with fe motors and know that most have four bolts you tighten down to set the valve lash, but this on has the adjustable rockers arms. Maybe someone mixing things up? Did 1963 galaxie z code 390 come with solid lifters?