318 pistons
Kinda wierd.I found a piston at Hughes engines.Listed as a cast sylvolite that has a 1.798 compression height.This is a good deal taller than most 318 pistons.
Cant find it on the sylvolite websight tho...maybe it was a typo?
Of course they list it with some part # they made up too,so you cant track it down.
Here:
http://www.hughesengines.com/partDetail.asp?partID=10283&eTypeID=1