Mike, thanks for the info, It will be interesting to see how the headers line up lengthwise when I put them on. I'm learning a lot about engine because I'm a modeler!
JC, and Richard, I've done the flat sanding thing before, not sure why I didn't on this block, maybe I'll make it a regular practice.
Frank, I used other facets of the engine to line things up (well I tried, lol), sometimes the tranny ends are uneven, I fixed that.
Thanks you guys, I appreciate all the great info, and , help. Sometimes I feel like I'm on my first build. My next goal is to not have the seams show, which is always a challenge for me on engine blocks.