Ford F450 in 1/64

There is a matchbox one.

http://images.google.com/imgres?imgurl=http://www.bamca.org/prem/96097.jpg&imgrefurl=http://www.bamca.org/cgi-bin/premiere.cgi%3Fpage%3Dcoll64&usg=__oHdqj-e-yMtJXlBRljo8gjJSCLs=&h=360&w=253&sz=25&hl=en&start=1&um=1&tbnid=64Ei-XNsGmWhcM:&tbnh=121&tbnw=85&prev=/images%3Fq%3D1999%2BKME%2BMini-Pumper%2B-%2Bred%2Band%2Bwhite%2B-%2B%2522Livingston%2BFire%2BDistrict%2522%26hl%3Den%26rls%3Dcom.microsoft:en-us:IE-SearchBox%26rlz%3D1I7ACGW%26sa%3DG%26um%3D1

The Mb is that in correct scale or is it worng(big/small)

It is 3" long and 1" tall I believe, standard MB size.

Here are a couple of reference photos, comparing the Matchbox KME with a Code 3 Suburban and the Code 3 Fire Investigation Unit.