What's the deal with the Poly 318

Poly Super Pac is on Facebook. Here's a new post:

Poly Super Pac We've just put together the 'ideal' POLY package... 360 crank with 318/340 mains; .060 over pistons (we have a selection of mild to wild); 360 rods; equals 357MAGNUM... just enough cubes to not demand major headwork but haul some serious mail! Figure right at $1200 for the econo kit and about $1700 for the 'deluxe' kit... Building one now (that's it in photo above) estimating 400ftlb (can also go 402 cubes if you're feeling 'lucky'!!!