Please note, Alvin & others, it has been reported by other people in this thread that their 261 did not come with the larger diameter thermostat housing.
There are at least two possibilities:
1. Earlier 261s used the same thermostat-size housing as used on 261s. Question for people with same size housing on their 261: is there a hose fitting in the top cover of your thermostat housing?
2. It is quite possible that people have bought a 261 from someone who swapped out the original thermostat housing for a 235 housing?
My two housings have a "documented" history of never being used in a small truck:
- one came out of a 1960 school bus in 1972 (by my hands) - one spent its entire life (1959-2010) in a high school auto-shop class/lab/garage (what a beauty)
