The word is, Speed Pro, aka Federal Mogul pistons, are now made "off shore", like in India now. That part number is also for SBC 350 engines. I say go to E-Bay and you'll find what you need and probably very cheap. Those are also a "rebuilder" style piston, and as such, probably have .020 off the tops to compensate for block decking/head milling when rebuilding short/long blocks. I like the appearence of the Speed Pro/Federal Mogul piston more than the Silvolite/Keith Black piston and they cost less to boot. I hear Silvolite/Keith Black are also made off shore now. Time to boycot/embargo some of these defecting companies.