Old rebuilt AC fuel pump.
Selling for parts as it probably needs to be gone through again.
Part number on tag is AC 3450R which crosses to Carter 3150.
59-60 Edsel, 55-61 Ford V8, 55-62 Ford truck, 59-61 Mercury V8, Fairmont Railway 54.
Pretty sure Y-block and FE use the same arm, just gas line size might be different.
$35 plus shipping.