I think the intake flows something like 268 at .550 lift, cant remember the exhaust. I wonder if 1.6 rockers would help compensate for the heads ramcharger?
Thats a good question moparmade, and a tricky one too.
.550 lift @ the intake valve equals a lobe lift of .366. Multiply .366 by 1.6 and you get a lift at the valve of .585. If your heads stall (do not flow anymore) above .550 lift, your gains will be minimal if anything and limited only to the additional amount in degrees that the valve will be open at .550 or more compared to a 1.5 ratio rocker. This measurement could only be found with a dial indicator, degree wheel and a set of V-blocks and is wholly dependent on the geometry that the particular cam grinder used to make the lobes and may only be a couple of degrees if anything at all.
On the other hand, if your heads flow 10 or 20 cfm more @ .585 lift you could stand to gain some significant power (20 or 30 HP).
High ratio rockers are not a cure all but do have their place. Keep in mind that high ratio rockers will move the pushrods in toward the rocker shaft and the push rod holes may need to be enlarged, also be sure the springs can handle the additional lift without binding and that piston to valve clearance is within an acceptable range.