1966 Olds 442 Tri Power Convertible

[WILDCAT_65]

4 Speed.

A good friend of mine has bought a 66 442 a couple of years ago. It is a original 4 speed, and has 3 deuces on a original manifold. The car was oiriginal tourquise, then repainted red, and was shipped to Germany in the early 90's.
When he bought it it had a Edelbrock Manifold with a quad on it, and the tri manifold with carbs was in the trunk.
He did not find any build sheet under the seats.

Is there a way to find out that it is a real "Tri Carb"?
He still has the old pink slip from California!