Can't find misfire

I decided to just take the valves from the head that I got in the junkyard because I got to thinking and I don't want to do an engine swap in an apartment parking lot. Already have the manifolds off and I found the exhaust leak. When the head gasket was done a few years ago, the bolts that hold the manifolds together were broken off. So now, I just have to get the alternator and a couple of other things out of the way and I should have the head off in maybe an hour.