99B16Si

i have a set of LS rods that came out of a 97 B18b1 but one of them is slightly bent so i was gonna replace it with onw of the extra LS rods i had sitting around that i know is good but is out of an older B18a1. heres the prob...all the newer LS rods are stamped "PR4 96" and the older LS rod is stamped "PR4 35" along with the other 2 older LS rods i have. i know the stroke and everything is identical but are these rods ok to combine in the same motor??? thanks