Buy a timing tab. They be cheap.
http://www.jegs.com/webapp/wcs/stores/servlet/KeywordSearchCmd?No=0&Ne=1+2+3+13+1147708&Ntt=timing+pointer&langId=-1&Ntk=all&storeId=10001&Jnar=0&Ns=P_Price|0&catalogId=10002&N=0&Nty=0
It all depends on what its on. Most cars look retarded with them, as where most trucks look good with them, IMO.
And thinking of getting a layer of 35% on the whole windshield.