Big block stroker questions

[Blackhawkdc]

For all those out there that have built a big block. I've got a MArk V 454 block that I wanna build into a stroker 496. A couple questions I have. First, how much clearancing of the block am I gonna have to do? Is this something I could do myself? the machine shop wants $200 to do this. What tools would I need and how would I go about doing it? I've got plenty of automotive tools, die grinder, dremel, etc. So I can get ahold of what ever tools I need. Second question: I found a kit from StrokerMotor.com that includes a 5140 steel crank, KB Hyperuetectic pistons, 4340 steel I-beam rods, all of this custom balenced. Will this kit handle 600 horse and 600 Lb-ft of torque? Or should I step up to forged pistons and different rods. I can get the above kit for $1500 with balencer and flexplate.

Thanks in advance.