What’s the best rods for the build

There is no way a 50 to 60 year old factory rod is better than a new 4340 H-beam regardless of where you buy it at.

Metallurgy is superior in new rods to OEM rods, larger diameter bolts, cap screw bolts clamp tighter, and a lot of aftermarket rods are lighter than OEM.

Now if you buy a Molnar rod you know you're getting real ARP bolts because they source them from ARP and install then at their shop in Michigan when doing the final honing.

If your dealing with junkyard parts and you have no real money in an engine that's one thing, but for what it cost to build even an economy engine today, let alone

something you have $10,000 in WHY would you ever take the chance and running a 50-60 year old OEM connecting rod with who knows how many cycles it has on it?

Tom
We know you want to sell some Molnar kit ;). You'll be first on my list when I need some quality reciprocating components.

That said, I am not convinced that the stock Mopar rods are insufficient for this application. Also, show me the data about metallurgy. I've studied mechanics of materials and it all was very established stuff, i.e. that **** was all figured out a long time ago. Like a century or more. There's no rocket science or exotic materials out there I. Aware of, with regards to alloy steels. Not in our arena anyway.