Dug up an old Oldspower post for the Oldsmobile emblem placement. There's approx. 3'16" - 1/4" space above the top of the "d", "b" and "L" for the bottom of the 442 decal and the decal is centered over the "oldsmobile".
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Note: Measurements taken off a factory installed trunk emblem on my 85 442. If you have a the chrome strip, which the 442 does not have any chrome strip, you may need to adjust the height measurements accordingly.
To bottom of black on emblem to the lower trunklid edge- 1 -5/8". (I'm only guessing, but if you added something like 1/16" to account for the chrome strip it may be ok for non-442s)
From the RH edge of the trunklid to the rightmost black edge on the "e" in Oldsmobile is 11/16" from the edge.
Hope this helps.