That tape was NASTY! It literally pulled the fingers off of my latex gloves. I had to go commando with a razor blade. After I got the big chunks off; I re-donned the latex gloves and hit it with scotch bright and denatured alcohol.

Cleaned out the threads in the heads, anti-seized the new header bolts, and am ready for the hard part (hopefully this weekend). Do I start with the easy side or hard side?