I have a Y block ECG 6015D engine with one C1TE head (also has a H 33 stamp) and one head with what looks like ECRR or ECR?.

I found the C1TE head as a 61-64 292, and a ECR? as a 1956-57 on a couple of websites, but I can't find anything that shows what the D suffix on the block means.

Supposedly this originally came out of a 56 truck. Any help would be appreciated, Thanks!

I would think its a 272 DEARBORN block, hence the D,

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

I think "D" simply stands for Dearborn, MI.

Re codes:

ECG = 1956 272

ECR = 56-57 272 HD Truck

A part number suffix has nothing to do with what plant manufactured a component.  i.e. - "D" is the fourth design variation of the particular component, a 6015 being a cylinder block.

The plant that casted the block would be identified by DIF = Dearborn Iron Foundry, or CF = Cleveland Foundry.

For the most part 272 and 292's were manufactured at the Dearborn Engine Plant and 312's at Cleveland Engine Plant #2.

Regards,

Dennis

     

An ECR head from HD truck had sodium filled exhaust valves, 7/16 in. stems.  I measured the combustion chamber volume on one several years ago and it was 73cc, compared to the 77 cc CITE, FYI.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

Thanks to all for the info!