As what I thought Bench Racing was. In the latest HRM is a very impressive 318 Poly that is out to 402. What crank allows that? Billet? The electronics on that thing must be more expensive than the Packard or Lincoln engines in the story.
Well they also took the bore out to like 4.03, .120 over. The crank is piece you can get from MP and other sources.
http://www.campbellenterprises.com/318-stroker-kit-mopar-318-5.2-stroker-kits.php The crank is actually a cast piece. The modulus on the block is so high and the bearings so large on the small block mopars that the crank is well supported. Incidently the stock poly crank is a forged piece... so in a way the aftermarket one isn't as nice, just bigger.
The crank is the same as an LA engine so anything that works in the bottom of an LA works in the polysphere, including the pistons, although with LA pistons the compression is considerably lower. That said Cambelle offer some actual poly specific pistons that will get the compression up to 10.5:1. I'm not sure which way to go yet on pistons. LA pistons are cheap and easy to get, and if I go that route I end up around 8.5:1 compression. Not a bad place to be if you want to run boost. 3.95 or so on the bore, 3.58 on the stroke, 8.5:1, 12psi of boost and fuel injection is sounding really good to me.
I actually emailed Hilborne to find out what that setup would cost to have made for me.
"So the full kit including manifold, Holley electronics and a complete
Weldon Pump fuel system should run around $7100."
So yeah... exact opposite of cheap.