My 57 T-Bird is a "C" with 292 2bbl carb and it has it's original heads that are the G heads. 

I have a 56 Merc 312 that has ECZ-C heads with freeze out plugs on the end,This engine was pulled from the car in the early 70s so probably is all original Carl

I vaguely recall some older reference material that pointed to the ECZ-D head being the factory head for the 1957 Thunderbird with the 292.  I’ll make it a point to go back through some of my older literature and validate this.

Lorena, Texas (South of Waco)

Pete 55: ECZ-A heads appear on the Mummert/Reese list (not on the Y-Blk book list) as on 1956-272 pick ups. And as on 1956-312 Mercurys & Ford Police Interceptors, likely with std trans or O.D., as compression was at 8 to 1. No list for 292s.

Neither listing any year shows ECZ-D heads.. So ??

Paul

Tom: By the Y-Blk book your "C" heads are correct & are one of two correct casting #s for std & O.D. transmission 272s, for 1956. The other casting # was ECG-T.

Carl: The head info you posted for the two station wagons with 292 std & auto transmissions by the Y-Blk book also appears correct.

Paul

For whatever it's worth I have a 56 Customline car 272 with C heads. I know it to be original. It was a standard transmission 2V engine with no other accessories. It even has standard cooling with the 3 blade fan.



Tom from the chiggerfarm located in the beautiful Heart of Central Texas

When you cannot dazzle others with your brilliance, baffle them with bullcorn!

i checked a couple 56 292 engines i have and found the following.the 56 292 that came out of a 56 Ford station wagon with standard transmission is a EDB block with ECZ-B heads.The car was stored since 1966 so more than likely it is the original engine.The other 292 is a ECZ-A block with ECZ-c heads and it came out of a 56 Ford station wagon with fordomatic trans.This engine was pulled out a couple years ago so dont know for sure it is original one or not

Carl

boy looks like I open a can of worms /The only thing Im sure about is it a 55 vic and the vin# says it was born with a 272/what ever I got was rebuild in 1988 and lest then 12k put on /it runs good but I would like to know what it would take to get 300hp out of it /I think I will call ted one of these days 

Another question regarding 292/312 cylinder heads. Which motors received the ECZ A and ECZ D heads. And would that imply that the ECZ A heads were made before the ECZ C/D heads and before the 1957 ECZ G Thanks for the information. Pete

I had heard that there were different head gasket thickness used.That would create different compression ratios.

Oldmics