CHRYSLER SMALL BLOCK FORGED CRANKS. 340-3580EB6F Small Block Chrysler -2.100" Rod Pins 3.580 340 2.100 6.123 1850. 340-3580EF6F Small Block Chrysler -2.125" Rod Pins 3.580 340 2.125 6.123 1850. 340-3790EB6F Small Block Chrysler -2.100" Rod Pins 3.790 340 2.100 6.123 1850.