Dennis it looks like the 239, straight arm pump and marv, the 256 has bent arm like 272-312, therefore later pump should do 256 engine? if i assume correctly. thank you all for your input. regards bill.

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

Hello there,I have a 256 in my 54 mercury and I put a 73 ford 360 on mine and it works great.... my wipers not so good

239 has a straight arm. If you google airtex 4070, you can see a picture of it .

  Dennis in Lititz PA

Dennis, marv, thanks, i,m trying to ascertain if the 239 was same as 256 pump, and hence different to 272/292/312/, i am trying to find out for person over here. i think the 239 pump has straight arm? but not too sure. regards bill.

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

Just a note regarding the CEBY blocks. I have one of those and it came in my '56 Mercury M100. According to John Mummert's chart it is a cast in Canada Export block. 256-272. Thanks

Mark

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

Bill:

Does the pump look like this. According to my Carter pump book the 55 F600 with a 256 engine takes a M3150 pump which is the HD model for the Carter M3528

The 279 engine took a M3022 pump .

marv

a fellow gave me one of these blocks about 15 years ago.untill then i thought 55 trucks were 272.these were CEBY blocks.they were the only true truck blocks,that is the only ones that were different than car blocks.there was a ceby  car block as well but it didnt have special mains just heavy trucks.the caps were 1/8 inch higher with 3 in bolts.i could see no difference in the fuel pump.these blocks were used to make 272s as well.

If it's like the 239, an Airtex 4070 is what I use.

  Dennis in Lititz PA

Thanks for reply, but dont think thats right.

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

if its a 55 any y pump will fit.your block should have special mains with 3 in bolts.