Weight of LT-5
There are rumors of a 1000 fwhp LT5 out there - probably a TT setup or running lots of nitrous. They are a strong engine and should be able to handle a goodly amount of power even with the stock crank. As I recall the stroker cranks were prone to crank walk early on. Not sure if this is still a problem.
You might also try www.zr1.net. There are several LT5 experts there that should be able to help you out.
Check out Fastlane Goldstein's site for some potential:
http://www.fastlane-racing.com/performa.htm 
