steering box pitman arm

I JUST PURCHASED A CARDONE 3rd GEN. STEERING BOX FOR MY 69 CAMARO. I KNOW THAT I NEED NEW ADAPTERS AS WELL AS COUPLER & BOLT. MY QUESTION IS, I HAVE 2 PITMAN ARMS THAT SEEM TO BE IN GOOD SHAPE AND I WAS WONDERING WHAT THE NUMBERS STAND FOR AND CAN THEY BE USED FOR MY CHANGEOVER? 1. 3953219...