I dont have a Dremmel, and it took me about 2-3 hours with sand paper :headbang: , so do yourself a favour and get one if you dont already, needs a good shave to fit on the bonnet.
I bought this kit http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=260480279532&viewitem=#ht_8590wt_1165 , so I would have to assume the 73mm emblem is right for the Bonnet (the sides and rear badge are same size, and bonnet is a bit smaller)