Hello again, I am finally starting the much-delayed replacement of the timing chain on my '78 NYB. Brad Hogg graciously sent me the relevant service manual, which brought a new question. Is it necessary to be sure to NOT move the engine once the old chain is off? Also, the manual makes a big issue about using a strange tool to prevent the cam shaft from contacting the welch plug. Can anyone tell me what this is about, and what method I should use in place of the strange "C-3509" tool, which of course I don't have. Thanks Bruce S __________________________________ Do you Yahoo!? Yahoo! Search - Find what you’re looking for faster http://search.yahoo.com