Giday all, new to the site. Just picked up a motor from a friend that I am going to finish for him. Unfortanatly he tried to install the wrong bolt into the front of the crank and stipping the first 4 threads. I looked at the bolt that he used and it isn't the right size. Does anyone know the proper size so I can rethread the crank and order the proper bolt for it. Needless to say he will not be touching it until it is running.

1976 Camaro 350

Many thanks in advance!

Rob