super easy to check for a valve stuck in a guide.
heck...
a simple test, head on the bench, tap each valve stem top with a hammer.
if it bounces back from spring operation ...valve is not stuck in guide.

on the engine ..use a prybar of some sort to make sure each valve moves
in its guide properly.

besides..
one *always*  *always* checks the smoothe operation and movement of ALL
components every step of the way, at every opportunity.

flywheel shims and bits there are good to consider of course.
Scott

On 12/31/2015 6:41 AM, OlRivrRat wrote:
>          Only Problem with Those Theories is that he said it Turns Fine Without the Heads on ~
>
>                  John
>
>          Did you try to see if it would Turn Backwards @ all With Heads on ~
>
>
> On 31 Dec , 2015, at 6:31 AM, kenneth wilford (Van-Again) wrote:
>
>> I think Darrell is pointing you in the right direction.  There is the
>> thrust washer that can easily drop out of place when you install the
>> flywheel.  Or you miscalculated the thickness of the endplay shims as
>> Darrell suggested.  Either of those happen way more often than a messed up
>> valve in a brand new AMC head (never).
>>
>> Ken
>>
>> On Thu, Dec 31, 2015 at 7:35 AM, Darrell Boehler <midwesty@gmail.com> wrote:
>>
>>> It is easy to add not enough  shim thickness on the crankshaft.
>>> Check the  crankshaft for end play. Loosen the Flywheel /torque
>>> converter plate
>>> then see if it turns then.  Been there done that.  When testing for
>>> crankshaft
>>> shim thickness it is easy to add not enough shims  because we don't
>>> tighten the
>>> the flywheel fully during testing / adjusting.
>>>      Best of luck with your projekt
>>> Midwesty
>>>
>>>
>>> On 12/31/2015 4:30 AM, John Rodgers wrote:
>>>
>>>> Engine turns beautifully by hand on the bench. Put the new AMC hesds on
>>>> with all parts assembled, torque them down,  and the beenengine won't
>>>> turn.
>>>>
>>>> Removed the heads twice, still no joy. Sounds like a valve stuck in a
>>>> guide
>>>> to me.
>>>>
>>>> Any body else ever had this problem or got an educated opinion?
>>>>
>>>> Thanks.
>>>>
>>>> John
>>>>
>>>>
>>
>> --
>> Thanks,
>> Ken Wilford
>> John 3:16
>> www.vanagain.com