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

Check out 440 Source. com part # 200-1149 I don't know if they will work for your application, but they have cap screw bolts and are new forgings. I have a set in a 600+ hp B block turning 6500 RPM. (I did change the bolts to ARP bolts because I didn't like the looks of the supplied bolts.)