that engine should have the 496 rod, those are very good rods, we ran a set, for 18 seasons, every 4 years, new mopar race bolts and resized. they are way lighter versus H beam rods. we turned our 340 7000 RPM in the traps, we have a customer, runs a340 dart, with same heads, cam is 254/267 .545 , 108 lca, runs 11. 20's 117 /118 MPH.
