 No matter what name is on them, have them checked. I have a set of Manley H beams that needed resizing before they could be used.  Just my opinion, I'd have those rods checked out by your machinist and reuse them. The KB pistons are fine as long as you gap the rings correctly.
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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