trying to verify if my ws engine is original.car build date 03a first week march. block cast date c865 march 8. tripower stated in another post that march april cars had very close dates.guess production was in high gear.also if anyone can help with acc codes. i know 5n was for gto,
car was built in pontiac.
line4 E 2LGPR
line5 4F 5NW
LOWER RIGHT CORNER 19-1W
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