I thought there was a chamber volume difference between factory heads.
 Something like 18cc vs 16cc, with the smaller chamber for 1.9l, if my
murky mind can recall.  I do know that AMC heads are sold same for
both engines.

2009/10/22, Mark Dearing <VWBrain@aol.com>:
> Also, I'm wondering how to tell if the heads are 1.9 or 2.1, as it  sounds
> like they should not be co-mingled on an engine.
>
> the 1.9 and 2.1 heads are the same  later   md
>

-- 
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Chris S.
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