On Mon, 21 Jan 2008 10:39:15 -0500, Bob Donalds <donalds1@VERIZON.NET>
wrote:

>The 1.9 and 2.1 heads look the same at a glance and most could not tell the
>difference unless they had them side by side The best way to distinguish
>them is to look at the chamber the 1.9 intake valve relief does not extend
>out to the edge of the cylinder sealing surface
>
>Bob Donalds
>Boston engine
>

I just measured the difference and the distance Bob takes about is larger
on my 1.9 heads.  Also, other than telling from the part number, the 2.1 OE
heads have a diamond pattern on the bottom of the heads.

Pascal
'84Westy