A dial indicator is the wrong tool to determine true TDC because the piston hangs for a few degrees at TDC... Really??? so if I take an indicator and run the piston up CCW until lets say .050" before TDC and then CW 'til .050" before TDC I wont get the same results??? Odd...   A dial indicator combined w/ a degree wheel will let you accurately find true TDC. There are a few ways to do this, all work equally well, but saying one isn't right is foolish. Piston stop and tape measure, piston stop and degree wheel, dial indicator and degree wheel, etc. all will work.
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
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