Barracuda trunk letter alignment woes

I replaced my 65 Barracuda trunk lid with a 64 or 66! I thought it was 65....but it must not be.

I installed my original P L Y M O U T H letters.
Darn it ; the M is approx 1/8” lower in alignment than the all the others.

Another words, the 2 mounting holes in the lid are lower.

Any know whether it’s a 64 or 66 letter “M” I need????

Thanks