I don't know what it would tolerate for compression. As you probably know head sealing (and the easily fixed cooling issue)are probably the limiting factors, but the wedge chamber, to me, signals some detonation issues waiting to happen. There's just so much crazy closed areas I wonder what could be done.
I made a decision on mine to leave it all alone as I was going after a different end (erm, reliability!), but, funny you should write now, i've been itching to make another motor even though I don't really have a car to put it in. OK I have a '61 American in the yard, and a pile of parts...
But I have this Barney Navarro Rambler 6 in pieces, and that might get my attention next.
I just realized recently that the Chrysler 4.0 connecting rods will actually fit in the ancient Nash motor; they're stronger, cheaper and I'm sure (not checked...) much lighter, and with good pistons (yeah right) maybe a good motor is possible.
I do wonder if any of the other nash six heads are adapatable.
