Eagle SIR6123CB rods Vs stock.

Hi all,
Wondering how the Eagle SIR6123CB rods compare to stock? I have a 318 I am collecting parts for to get rebuilt. By the time I get new rod bolts and have rods resized it’s probably worth buying a new set. Aiming for high 300HP 318. Hopefully 400HP. The 318 is from 1982 and I believe same rods used in the 360?