Cast rods were standard in most Poncho engines including the 455 H.O. (with a 5,600rpm redline), so a little cleanup and some new hardware will more than do the trick.
Read more:
http://www.hotrod.com/techarticles/engin...l#ixzz1XkpcRxldSo with ARP rod bolts and the shot peening i should be ok to 5600 RPM.