OK  Here's a pic of 2 heads.  Used one is the D head.  The other is from the set of new heads I bought.

A surgeon never says OOPS!!  BUT, I'm not a surgeon.   Guess I got carried away with the 0's.   And yes,  I meant  0.021.          At 0.0021   I doubt you'd ever  had problems with the pistons  just cause of the head gasket thickness.

Olweldingrig   I will post a couple pics of those heads maybe Thursday.  Got to go see mom tomorrow before work.  Plus its 5 degrees outside tonight!!   LOL

Did you mean 0.021” rather than 0.0021”?  If the number is 0.021” out of the hole, then that likely indicates at least 0.050” cut from the decks.

Lorena, Texas (South of Waco)

A big truck?   Is it a 292 or a Lincoln Y ?   Lincoln y is a different animal.   

Any pictures of chamber in the "D" heads?I am curious because I have one D with a 58 style chamber and one stamped "D" head with a 57 style chamber.Both came off a 56 big truck engine,obviously one was changed at some point.

Happy New Year!!   Having some time off I've been playing with my project.   I finally popped the pistons out of the block I have on the stand.  My neighbor has a harbor freight micrometer I borrowed.  Not the best, but close.   I'm getting 1.75 for the center of the pin to the top of the piston.   So,  the block has been decked.   I'm wondering if the stacked head gaskets had more to do with the intake not meeting the heads with the block decked that far.   I didn't have an intake with the engine when I bought it.
Has anyone used one of Mummert's reground cams?   I found a page where he has reground cams and lifters for $175  He only has 2 grinds.   256 and 264 advertised duration.
But that's a good deal in anyones book.   

That was my thought about pin height.  I believe that HD pistons used a different height pin.   The pistons have a 30 in the top,  but I haven't popped one out to see if its an oversize.       I don't plan to rebuild that block.   I plan on rebuilding the block that's still running in the truck.    For right now I'm concentrating on the top end.   I checked the rocker arms I have,  they are ECG 6564 rockers.   They are not loose on the shafts.  The shafts don't look scored either.   So I call that a score!   Now for the heads.  I was looking at the valves.  I don't have any micrometers.  Will the 1.78 intake valve sit down in the 1.64 hole?   I was able to take a intake valve from the ECG-D head and it fit right in the new head.   So now I don't know what head I have.   I can't see any posts in through the holes in the head.   

About the pistons sticking out of the block. Possibly the block has been decked excessively?  Or, and I may be corrected on this, it may have been re assembled with truck pistons that have a different wrist pin height.  


Paul

If wanting an increase in the torque values, then consider using the ECG heads as the combustion chamber design in those are more conducive to promoting additional turbulence at low rpms.

Lorena, Texas (South of Waco)

Thanks for chiming in Ted.  I know you go through these questions all the time.   It's 50 outside in Parma today, so I went out to the garage.   Upon further investigation,  I found C1TE cast in the heads on the side that the head gaskets seal.  Then I have the ECG-D heads on the shelf.   Which ones would I be better to throw money at?                                                          Then I moved on to the 292 I have on the engine stand.  I picked it up a couple years ago as scrap.   It had been supposedly drag raced,  who knows.   It has an EC crank and EBU rods,  but the pistons stick out of the block .0021.  They had double stacked head gaskets on it.   I pulled the front apart this morning and pulled the cam.  I was thinking of some radical thing.   NOT!!  Lol  Its got a FoMoCo cam in it.   The only id numbers on it are behind the 1st lobe at the front of the cam.  The 1st number is
67,  when you roll it over 180* it has an 81.   Anyways,  doubt I'll use that one.