Forged 4340 Steel I-Beam Connecting Rods Chevrolet 305/350. Eagle SIR6000SBLW ESP 5140 Steel I-Beam For Chevy SB 6.000 In Sj. Eagle 104604140 ESP Cast Crank For Ford 460 4.140 In Stroke. Eagle 103023000 Cast Steel Crank 3.000 Stroke For Ford Small Block NEW.