Well I installed the LFP evenflow head cooling mod today and I must say that was a royal PITA. I swear I was on my way to having to pull my head off and get it repaired. I try removing the freeze plug the way the directions said too, but there was no way. I went to there website like the directions said to and read there trouble shooting section and tried that, no way. Needless to say after a broken hammer, two broken drill bits, broken bolts and bent screwdriver and alot of cursing and a 6 pack of beer, I finally got the freeze plug out. The rest was easy but man I wish I had got the LDC head cooling mod, I wonder if the install would have gone smoother:shrug: However, I am still not convinced that 1/8 above the head is acceptable for the new fitting so I used some high temp RTV as well. Anyone else have similar problems?