[olddog]

A 100 grams difference times 8 pistons is 800 grams - divided by 454 g/lb and its darns near 2 pounds.

I never weighed them before, but my gut tells me that an entire rotating assembly (damper, flywheel, crank, rods, pistons, wrist pins, and rings) of an FE has to be significantly more than a Windsor. I know you can buy light weight stuff - especially if you have deep pockets. So an apples to apples comparison is appropriate.