The block number "880" typically indicates a manufacturing year for an engine, and the "5.7LG" refers to a 5.7-liter engine, often associated with General Motors. The "SGI" code can suggest it is part of a specific production line or model designation. However, without additional context or a specific manufacturer, pinpointing the exact year is challenging. Generally, engines with similar designations were produced in the late 1990s to early 2000s, but it's best to consult specific vehicle documentation for accurate dating.
A block is not a standard measure.
Year of manufacture for a Marlin 880 SQ, 1996
880
2002
Half of 880= 880/2= 440
60% of 880= 60% * 880= 0.6 * 880= 528
880
45% of 880 = 45% * 880 = 0.45 * 880 = 396
880
880 is 95% of 924. 924 is 105% of 880.
0.0023
880 = DCCCLXXX