Carrier Fan failures

[Lynn Eades]

Thank you gentlemen for your interesting replys.
I have done a little research: (I'm an amateur)
Anyhow, I have 7 flathead Ford V8 inlet manifolds. see photos.
I have numbered them 1 through to 7
1,2,3, have carb mounting flanges that look like they would suit 97 Strombergs?
4 is a special unit. Part# C29SR 6520. More later.
5,6,7, have the Holley style carb mounting flange. For those not sure, the carb stud arrangement means all the carbs fit all the manifolds.
1,4,5 are cast iron, the rest being alloy.
1,2,3,7 have the blanked off forward oil filler hole.
6 is from a post war 8BA.
1,5, I cant find a part number, both being similar except 5 lacks the forward oil filler hole.
1 is drilled for positive crankcase ventilation 5 is not.