Heres what I would like...
And may work on next winter
Either cast with liberal finning or better yet, carve out of billet.
Major cost is the 17 inch x about 7 inch, x about 3.8 thick slab to start off..
![Shocked :o](http://forums.sohc4.net/Smileys/default/shocked.gif)
So cast is really the only somewhat reasonable way to go, but will still come out at probably 700 plus, easily (likely) more...without pistons..
As far as I know NIKASIL is a proprietary coating (plated), put on to a certain thickness much like hardchrome.
I think the billet with thicker fins would be just too cool..