to put things in perspective,this engine was built for a customer at a cost of 42,000.00.

What would it cost to have a big block built in that same power range? I seriously have no idea as its all out of my price range, but I would think it would be about the same right?

pretty cool..and $$$$ here's a pic of my 1200hp street LS, 370ci using stock intake and exhaust manifolds, 25psi on E85...not pretty like this one...but with hood on....

i would think a big block build of that caliber would cost pretty close to that price.high end parts are not cheep.i spent some crazy money when i built my 588s.

that is 3.24 hp per cubic inch,very impressive.

It is about the same amount whether you build a BBC or an LS of the same power level.
Eddie

What would be the pros/cons of each motor?

Efficiency, better valve train geometry? Etc.

The LS is smaller and more compact. It also weighs less. However, it doesn't make the torque that a BBC does. It's not that much less, but less none the less. It's different., I guess, is the big draw. At least for the marine side. The automotive guys have embraced it like nothing else in history. The LS's are a great choice for a smaller single engine boat, or maybe a 28-30 twin that would normally have small blocks. It can take the place of a BBC, but it would have to be built pretty tough. The availability of parts isn't what it is for a BB. That's why the cost is roughly the same. As more manufactures come out with new parts for the marine side, the pricing will come down. It's still a viable option for just about anything other than a HUGE boat that wants/needs a ton of power.
Eddie

Looks like an aluminum block also, that thing must be plenty light compared to a BBC. I am curious how well the aluminum block does with deflection at that power level compared to an iron block.

I didn't read the article so maybe this was stated in it, but is that front accessory drive from Wegner? That's what we used. Looks the same. They have got it all figured out to work with a Whipple.