318 Connecting Rods and Crankshaft

Which Weiand manifold do you have(name or P/N) and what is your grind number on your Lunati cam? Secondly, with a four inch crank the rod ratio is going to be close to the same as a 454 Chevrolet. The best near daily driver example I knew of that was an oval port standard deck engine in a C50 tow truck. It still runs, has been going on the stock short block since the early eighties. What is your projected or required power output and vehicle weight? It sounds like your pretty well dead set on a stroker, and I won't argue against it, but a well built 318 will probably do everything you need it to. You don't need to find new parts. Look for a 318 donor engine from a 67-79 truck. A lot of these still had a forged steel crank that was shot peened, flame hardened, and then nitrided. Unless the PO's were horribly negligent, the most it will need is a good cleaning and the journals miked to confirm they are round and true.