There is a 57 intake manifold on eBay now with a vaccum connection in front of the carburetor( ECZ9425 B).  My intake does not have that vaccum connection. 

Also, I removed a two barrell 57 intake from my 55.  On that intake I had a 56 Fairlane Bellcrank.  When I installed the 56 Bellcrank on my current 57 4-bbl intalke, ECZ9425 B, the bellcrank would not fit unless elevated with anbout 4 washers???  What do I have?

Thanks!!

Gary

The early version from 8-56 to approx 4-57 does not have the firing order. Around 4-57 the firing order was added in front of the carb. The Truck HD 292's used the ECZ9425B as late as 1964 but these do not have provision for the choke heat connection.

http://ford-y-block.com 

20 miles east of San Diego, 20 miles north of Mexico