crank & piston ID

Crank looks forged as you think. Those balance pads sure look different, almost like they are added on....???

Pistons look to be cast as said. The cross-hatching that can be seen in one pix under the crown is common on UEMP cast pistons, so these may be Slivolite 1267's which have 4 eyebrows, and which are kind of a medium low compression piston. They are not the same as the super low compression late production 340 pistons, and which sat .070-.080" down in the hole at TDC. Look to see if the number '1267' is cast in one of the skirts, surrounded by a circle of dots.