Congrats Aos! No way to say if more rest would equal a faster time. Three days is pretty good rest. Some people do better with less, some with more. Sorry for the totally non-committed answer! Certainly you went out a tad hard, so there's that. If you want to find out what that was worth (at the expense of exposing yourself to a herd of trolls, of course), start a post asking what the LRC pundits think you could have run with appropriate pacing AND the 3 days rest ; )
I think the pacing error would translate to a 2:27.