I don't have my references with me but I don't believe that the stamped numbers will give you the weight group. You probably need to weigh them. I have a single 2.4 connecting rod (refurbished by Ted Robinson) I can sell you if it is within the rod weight class you need. I made the mistake of not checking weights before I had the refurbishing done and this one was out of tolerance range for the rest. The engine had suffered a major failure in one cylinder and therefore had a head, piston and rod that didn't match rest (production dates, weight class, etc.) of engine parts. This odd weight rod was one of the things that was replaced; at least it was moved to a crank position where it caused the least balance problems. Let me know and I'll check the rod weight class; the reburbishment by Ted Robinson was first class: new small end bushing reamed to match big end, clean-up (media blasting?), etc.
Jim