my headers are chrome will they discolor during the break in? I still have the old ones i can use ,everything is new in block,60 over pistons,cam,lifters,valves,springs,push rods,rocker arms,all the chrome on engine is new ,new oil pump, timing chain,new seals in transmission,new lokar shifter,350 with alum case powerglide,2 holly 450cfm,electronic ignition,ordered wilwood disc brake kit from speedway