Originally Posted by fbs63
The dome shape looks like an Arias piston to me. Or possibly SRP.

iagree That step cut in the dome looks like some old Arias pistons I've seen before. Doesn't look like any TRW/Speed Pro I've seen.

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