FWIW...my hemi was originally built in 2006. Since then I've re-ringed it twice (moly rings) and used a "dingleberry" hone both times. It will still give me timeslips like it did when it was fresh. Best MPH ever on motor in 2007 was 140.4 mph in good air. The last time I ran the car on motor in good air, it went 140.2 mph after the two previously mentioned freshen ups (8 years later).
Not saying this type of hone is best, it certainly isn't, but it sure aint all that bad either.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 4 speed, Dana 60
'71 Demon 340, no drivetrain, on blocks behind the barn
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax