I had already bought my '01 when I learned about the 53 block issues. Mine wasn't one of them.
Really cool fixing up yours like new again! Wish I could have kept mine b/c I loved that old truck, it just didn't have enough room for the family.

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