How much power can the stock rods in a 383 B handle with a blower?

I think the stroke is 6.358 in., does anyone knows where I can find these forged rods? I already looked on jegs, summit, eagle and a bunch of sites. On eBay there seems to be one set of it, but its code is for a BBC. Obs: I already bought the internals for dodge, so I cant utilize the chevy ones.