[71 super]

Is cam solid or hyd? It is possible that you have bent a push rod causing the rocker not to move- especially if the motor has turnd some rpm and needed readjustment. Crank the motor and listen to the noise using a piece of broom handle or water hose or a engine stethoscope. If you have a timing light and the hose etc. you can quickly isolate if it is in fact valve train or lower end. With light hooked up and working listen to noise with hose etc. if noise is 2x as fast as crank rotation it is valve train, if it is in time with the flash it is lower end problems. Valve train issues will create the rough running you have described and if one push rod is bent chances are other are as well, if they are not hardened they will break and can fall into the lower half causing other problems. As for the oil consumption, what type of rings did the guy use in the engine? If he used chrome moly, they can be a bi--h to seat sometimes, in the shop I used to work at in a past life a set was installed in a 390 ford engine that never did seat properly, ended up going to standard iron to get the oil consumption to stop. 5 grand seems like alot of money for and engine especially after seeing no roller rockers and what looks like regular proformer intake. What has been done to the engine to justify the cost- I realize port and polish stainless valves but goods heads run about $1200-1800 where did they spend the rest? Not trying to be mean or nosey but seems high for what I see in your pics,it would also help to know cam specs.