Don't cut the tabs off of original parts. They are to valuable to damage with short cuts. If you're going to cut the pins and glue on the letters with emblem adhesive or tape, do that with reproduction parts that can be replaced.
If you still need a template, I'll cut out a cardboard doll and scribe through the holes for you. I need to wax underneath the letters anyway, lol. I'll do it accurately. Send me your address by PM.
If you center punch each hole, pilot drill and then go through with the correct size, it should all work out. If you have doubts, get a scrap of metal and do a practice run. You would want to verify the template anyway.