Topic: 1967 390 thermostat housing

[67gt390fb]

I have a half decent Jan 67(67 with 1 dot) thermostat housing (pictured), would like to trade for a half decent Nov 66 (66 with 11 dots) housing.  If not, then I will be using it on my own engine

note: these are the large thermostat housings

[Bob Gaines]

I have a half decent Jan 67(67 with 1 dot) thermostat housing (pictured), would like to trade for a half decent Nov 66 (66 with 11 dots) housing.  If not, then I will be using it on my own engine

note: these are the large thermostat housings

I believe those C5AE thermostats housings were used on Mustang FE engines on or before Dec 1966 . That was when the smaller thermostat came into use and consequently caused a change to the C7AE-A thermostat housing which was designed around the smaller thermostat. 

[67gt390fb]

Had to think about that one Bob.   I looked back and found the thread about change over date from C6AE-G to C7AE-E intake manifold.                                                                   
 
 not much data, but:

 oldest C6AE-G casting of 6M9 reported
newest C7AE-E casting of 7B7 reported

that puts change over between late Jan 67 thru Feb 67.   Which would mean the large thermostat housings were still being used in Jan, maybe in Feb too.

[Bob Gaines]

Had to think about that one Bob.   I looked back and found the thread about change over date from C6AE-G to C7AE-E intake manifold.                                                                   
 
 not much data, but:

 oldest C6AE-G casting of 6M9 reported
newest C7AE-E casting of 7B7 reported

that puts change over between late Jan 67 thru Feb 67.   Which would mean the large thermostat housings were still being used in Jan, maybe in Feb too.

That only means something if your reported data doesn't have any missing data and can be shown to be conclusive. Given Fords documented cut off date for intake do not jive with your data in concours for example you would be expected to have documentation(pictures etc) to support a later then 6M intake usage. Fords documentation trumps any well intentioned internet survey etc until more conclusive data suggests otherwise which has happened before but not for this
issue as far as I am aware. At least not yet.