72 Duster 340 number matching with j heads wanting to buy some roller rockers not sure what will fit, don't want the best and don't want anything cheap either yes I just put a cam in her that's why im needing one.
Are you wanting roller rockers for their adjustability? If you are looking to just raise the rocker shaft to get it back where it was before the heads were milled I have a full set of aluminum shims you can have for the price of shipping if you want to try them. Geometry will be a little off as the valve height didn't move. Much less expensive than a new set of rockers.
