Not withstanding that this is a Forum about the Ford/Mercury Y-block engine & so on, the idea of substituting one into a Merc Comet is not a good idea. As pointed out, there will be numerous mods required to do it. Further, the 221, 260, 289 & 302  SBF engines are a much lighter engine than a Y-blk, & even lighter than an SBC engine. Best stick with what reasonably fits the Comet chassis..    


Paul

Not to mention the much greater costs involved and parts availability issues when you deal with Yblocks. Stick with a Windsor, that's what belongs there, and I think they are a nice little motor as well.

unless he has a South American Y-block with the Windsor heads. talk about hybrid.



This ain't no L-Kamino!

Lou also made another good point regarding putting a y-block into a Falcon, Fairlane, Comet, or Meteor, Chuck.
A completely assembled y-block weighs in at ~610 pounds!
A complete FoMoCo 221, 260, or 289 cu. in. engine of the '60s era weights less than that, I'm sure.
Installation of a Y-block in your Comet would likely require changing your front coil springs.

Food for thought...


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

Chuck, in the Forum category 'Technical' is a recent thread topic titled, '239 y-block'.  It will give you a quick intro to the nuances of the first year Y engines.  There is a difference in the size of the camshaft journals among other things.

My understanding is that as Lou stated, mounting a y-block in a Falcon or Comet is not easy because of the fabrication work needed for motor mounts.  Original style mechanical clutch linkage would be another challenge that could be simplified with a hydraulic actuated system as was used on some Ford pick-up trucks.

I believe at least one active member of this Forum has done what you've asked about doing, putting a y-block in an early '60s Falcon or Comet.  Consider re-posting your question as something like, 'What's involved in putting a y-block in a '60s Comet?'

Hope this helps. 


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

Y-block in a comet is a bad idea., lot of work,I mean a lot,most everything will have to be fabercated from scratch. and the Y- is heavy compared to the 260, 289 engines.

Sorry, I read the ad wrong.  It is a 239 CU in Y-block not the 289.  I have a '64 Comet with no engine so I am looking for an engine I can use.  I apologize on the wrong forum.  (Not the number one mechanic here!)  Just trying to put my Comet back together and needed some help. 
Thank you,
Chuck

Brodie may be correct.  You may be on the wrong Forum.

Y-block Fords were 239, 256, 272, 292, and 312 cubic inch from the factory.  Telling them apart is another story.

All of the 1954 - 1964 year Ford Y-blocks can be identified by the location of the ignition distributor.  It's in the rear of the engine.

Write us back if the engine you called a 289 has a distributor in the rear.

Hope this helps. 


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

289 is a Windsor block, not a Y-block. You are on the wrong forum.

Will the Y block 289 fit my Comet?  What 4 speed tranny is needed?