318 Pistons: baffled

BTW, OP, I see in the SilvoLite catalog that they make some flat top 318 pistons with a higher 1.741 compression height than the flat top truck piston. Again, the crosshatch pattern says Silvolite to me. They may have sourced some to FM or they got in the wrong boxes. Were these the $7 ones?

Go to this link and look at page 23:

www.uempistons.com/catalogs/silvolite_catalog.pdf

BTW, the Sterling pistons are an older company that FM absorbed in the 60's; see Wikipedia.