Question of moment!

I think the bolt is the same as for a 426 Hemi. Indeed, several crank parts interchange (seals, ...). If you have an earlier slant (pre ~1978 ), you even have spark plug tubes like a Hemi. So when the crackers at the stoplight ask "that thing got a Hemi?", just tell them "yeh, the 6 cyl version".

gunbunny, you need to chill out. A lot of people here can help you, but not if you have a bad attitude and don't carefully read the responses to your questions. BTW, your question has been asked many times, so a Search would get the answer without the personal interaction that upsets you.