Does anyone know of any websites, or dealers that sells a forged engine build kit for the 3400 like JBP does for the 3100?
as far as I know the rods are already forged.
Only option for a crank is to turn down a 3500 one, but should be plenty good for what you are looking for.
Pistons will need to be custom
http://60degreev6.com/showthread.php?t=24943
I used weisco ones, they can be custom ordered, if you like I can find and post the order number from mine if you are looking for 9:1 .030 over ones.