What was the DA?
Like quickd100 said, it doesn't sound like you're spinning it real hard, but the video may be deceiving.
Have you tried leaving off a fast idle? You are footbraking right?
Just looked through my logbooks, and my closest comparable timeslip running mid 6.20s are all at 109-110+ mph.
You're still on a big bias ply tire though right? That might be why.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
| 
