someone correct me if I'm wrong but from what i've read, if you can make 2 check marks you can save yourself a few hundred dollars and do it yourself if the vehicle is 25 years or older...
NHTSA: Form HS-7
Check BOX 1 since vehicle is more than 25 years old:
"The vehicle is 25 or more years old or the equipment item was manufactured on a date when no applicable Federal Motor Vehicle Safety Standard or Theft Prevention Standard was in effect."
Here's the form -
http://icsw.nhtsa.gov/cars/rules/import/hs799short.pdf
EPA Form 3520-1
Check Code E since the vehicle is more than 21 years old:
“Vehicle at least 21 years old and in original unmodified configuration is either exempted or excluded from EPA emission requirements...”
Here's the form -
http://www.epa.gov/otaq/imports/documents/3520-1.pdf