the reason the guy on KA-T is even bothering is cost.
L20B cranks are relatively cheap if you can find one ~$100. If his calculations are right with a little machining you essentially have a fully counter weighted crank a la BC...for a few hundred dollars. The modular ford rods are just as strong as the BCs and Eagles that everyone uses, but you can get them for MUCH cheaper. a set of eight usually sells for ~$300 new, stalk the ford forums long enough and you should be able to find a set of 4 usable ones for almost free. The pistons will be $500-600, nut needed to get back to a respectable CR. If he finishes the project, I could see this becoming another viable option for people that want to build a cheap fully forged KA that is balanced and revs to 8500.
It should cost about the same as my build, which is spiralling outta control. Hell, I'm looking for a L20B myself to see if I can help the project along.