Originally Posted by Fishstix
I am trying to remember why, but I had an issue getting that sucker off. I remember having to use a set of really good vice grips. And, of course, a hammer. Am I off thinking not all of those adapters had the hex key? I will try to dig through my notes.



No your not off, both of the 03 blocks I have here don't have the hex , the 6.1 I have is an 07 and it had the hex .

1963 Thunderbolt 496FE 10.80 (still a work in progress)
1968 Mustang slow a$$ 428 FE
1971 Boss 351 Mustang 11.20@115mph
1993 Lightning 10.61 @ 129mph 408Ci A3 headed NA
1996 Viper GTS
2001 Lightning 8.99 @ 155MPH 5.4 Mod Motor
2009 Ram 9.65@144MPH 463CI G3 NA
2010 Challenger 9.91 @ 139MPH 408CI G3ci NA
2019 F150 (local dealer's Lightning package) ..11.90s