alright so i burnt a spark plug and the electrode fell down into my valve and chipped an exhaust valve how hard would it be to replace that

 

Have you ever taken a head apart?

 

Head needs to come off and check ALL your valves especially where the electrode fell. You dont want to re-use that valve no matter how small of a nick it got from the electrode hitting it. (especially the exaust valve cuz wen it heats up, it gets super hot and with a nick in it, its bound to fail.) jus replace the valve and check your head and other valve train parts.....