I found where Trw said that all L2000 series are forged and if it ends with an F it has floating pins.

Someone on FABO ID'd these as - 70-71 383 2 barrel (non HP) 1.863 compression height.
I have not yet been able to confirm this.

The L2315F Pistons that they still sell have 1.92 compression height.

In theory, there is no difference between theory and practice. In practice, there is.