[romad]

You want to find true TDC, with out the flywheel mark you are guessing up to plus or minus 10 degrees. Eye-ing the mark is even not the most accurate method. With a installed timing belt its not critical because the cam-crank is in a known working relationship. Assembly with out an attached belt you better be sure on this engine, because of valve interference and performance. If you have the head off I would degree the crank TDC with a degree wheel and dial indicator. Guessing on this engine could be a disaster. There are hundreds of references on the web to get this done.