I will be taking that apart tonight, the pics I posted were the farthest I got. My day job has been keeping me away! I am pretty damn confident after all the other numbers I have found it's a 312...

How about a picture of the crankshaft flywheel flange. Even if it is a 292 it can still be made into a great road worrier that will push you 54 down the road with ease.

Gary Ryan San Antonio.TX.

Thanks Billy! Here is a few photos from last night!

http://forums.y-blocksforever.com/uploads/images/a42c4f6c-6325-4f20-873c-
18d6.jpg">

Hi Betsy, Good news! although Mummerts site list that an ECZ block can be 292, I have dismantled about a half dozen ECZ blocks and all turned out 312's so chances are very high that you do have a 312!
The downfall is, parts are scarcer and more expensive for 312's and they are prone to cracking in the main web areas due to the larger mains. Read Mummerts Y block assembly errors page! May want to magnaflux in those areas.
The C heads are a great all around middle of the road head, however the G's, 113's, 471's and B9's have the larger intake valves.

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

Lol, thanks so much Rono

Betsy;
Learning curves are usually a challenge, take your time. From John Mummert's Head Casting Chart http://www.ford-y-block.com/cylinderheadchart.htm you can see that the ECZ-C heads were cast in 1956, but could have been used in pickups, Ford Cars, Mercury's or T Birds. When you take the valve covers off, you should be able to also see casting numbers on the rocker arms which should tell you what ratio you have 1.43:1 or 1.54:1. Once you get the bellhousing and flywheel off and can see the crankshaft flange, that will give you a good idea if you have a 312 or not. ENJOY!!
Rono

  Ron Lane,  Meridian, ID

Ok so after tearing apart the motor more I found, the heads had the CF logo from the Cleveland foundry and ecz - c side of heads, sorry I am a dumbass about this but I gotta learn, I will tear down more tomorrow... this is the farthest I got! will get to the crank shaft and more tomorrow. Thank you so much guys, this is a heart racing journey.... )

Also the rear main seal retainer will be ECZ-6335-A for a 312 but you should know by the time you get to it.


Mark

1956 Mercury M100
1955 Ford Fairlane Club Sedan
Delta, British Columbia

YES...  UNLESS you are only going by the engine block casting numbers...

From John Mummert's web site -  http://www.ford-y-block.com/

____________________________

YEAR    CASTING#         Cu.In.           Int.valve        Carb.              VEHICLES

   '56          ECZ-A             292/312           1.78"            4bbl                56 Ford, Merc & T-Bird

1956  ECZ 6015 A engine block   
Check the crankshaft main caps...
- with EBU maincaps =292
- with ECZ main caps =312  
OR
Check the crankshaft rear flange...

____________________________

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York