You're both right pretty much. But it has to do with scavaging is my thoughts.
https://www.performancetrucks.net/fo...87#post3602087

 

Damn how did I miss this thread? And yes thats my old truck.

 

timeslip-timeslip-timeslip???????????

 

Where are you running? I wanna come see that thing!

 

i also have a 408 and my mph on motor is pretty close except mine went 12.0 with the tailgate out and no spare tire and 10.7 on a 200 shot of go juice my cam is on a 114 lsa that why it like the juice so much going to change it to a 112 pretty sone and my compression is 11.5 to 1 on 93 octane on motor and 104 for the nitrous run