The "steel" ones are called sintered iron. Much better then the aluminum pistons. If the unit sits for about 2 or more years the alum. ones will be stuck.
George

Last edited by Wrenchbender Ret.; 06/04/2021 9:05 PM.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
In the Gallery Forum