What type of hitch do I need?
Realistically, you will need a weight distributing hitch for a 28', 1978 Airstream Ambassador. Airstream lists the base empty weight for a coach without any options, accessories, or fluids as 4,630 for the twin model and 4,690 for the double model . . . dry hitch weights are listed as 550 for the twin and 575 for the double again for a coach without options, accessories or fluids. The standard ball size would be 2 5/16".
The fact sheet for Airstream dry weights is attached to this post.
Good luck with your acquisition!
Kevin D. Allen
WBCCI (Lifetime Member)/VAC/Free Wheelers #6359
1964 Overlander International/1999 GMC K2500 Suburban (7400 VORTEC/4.11 Differentials)
1978 Argosy Minuet 6.0 Metre/1975 Cadillac Eldorado Convertible (8.2 Liter V8/2.70 Final Drive)