Greg,
The 151 6.000" rod is a direct swap, no need of reworking anything, as long as the lenght fits your needs.
The other rods all have bigger bearing ends, they all use a thicker crankpin, the 350 goes 2.100", the Mopar has 2.125", and the bigblock chevies all goes 2.200" std. This means that there is no bearing to fill the gap, as long as your crank has 2.000" crankpin. Also you should consider the rod width, all V8 rods are normally narrower than an inline rod. So, even if You were able to fit a 350 6.100" rod into your engine, for exemple, the rod foot is too narrow for the crank and will have excessive side play.
