I went to a salvage yard & got a 366 flywheel yesterday & it had the pin in it. I got another 366 flywheel about a mounth ago & there was a pin in there to. But you cant get the pin out cause the pan is in the way & it dont work to try & pull it out with a vise grip. So will have to order some.
Wrench Fetcher if your 427 dont have a pin & there is a hole in both the crank & the flywheel I would get one & put it in there there under $2.00 ea.