That will be the last thing because I want to see what length will fit. I cut firewood quite a bit and I will have to be careful because the piece will slab off if I just try to slice it off. I will make an undercut and then cut off small pieces. The long end needs about 2'+ off and that will weigh a few pounds and I don't want it crushing the already weakened fence below.
Thanks for all the replies. I did want to make notches, on the underside of the top log, for the posts to set into. However, when I was standing on the 16' scaffold trying to manuver the 35' log over my head, I had visions of me being killed by this thing. I am a retired fire captain and I can't tell you how many time I have heard "I thought it would never happen to me".
I was going to put the top log in place, mark it, take it down, cut the notchs and then put it back up but I figured I had pushed my luck too far and it stayed as it layed.