http://www.imcdb.org/movie_74923-Mother,-Jugs-and-Speed.html

I don't know if this ambulance is the 1962 Pontiac Ambulance requested in main page of this movie.
I got from youtube this picture and there says it's a "Cotner-Bevington" ambulance.
I leave you here two links with more information about this type of ambulance
http://www.coachbuilt.com/bui/c/cotner_bevington/cotner_bevington.htm

http://home.comcast.net/~oldsfan/MySite/62cbambulance.html

And now the pic

No, that's still the 1970 Oldsmobile.
http://www.imcdb.org/vehicle_109553-Oldsmobile-98-Ambulance-1970.html
I'd like to be able to remember where I saw the '62 Pontiac. I know I'm going to have to rent this again to find out.

Come to think of it, all the ambulances you have at that link are Oldsmobiles.

Yes, you are right. I have just read that link about Oldsmobile 98 Ambulance in Mother, Jugs & Speed and there, in comments, Buc84 and Animatronixx say is a Oldsmobile, built by "Cotner-Bevington", adding Animatronixx, is a 1970 Oldsmobile Cotner/ Bevington Cotington 48" Ambulance.

http://www.imcdb.org/vehicle_109553-Oldsmobile-98-Ambulance-1970.html