should i get the bottom end balanced??

[s2 rich]

hi all just a quick and probaly answered before question what are the benefits of the bottom end balance.
I am in the process of puttin my engine back together got some rods and pistons off jay unsure of manufacturer , the block will have to re bored i am also gettin a kevlar clutch off kestrel transmissions so what advantages would i get from balancing them.
I have spoke to bassett down balancing and if i did get it done it would go there.

need some help here guys cheers for any response rich ...

[Puglife]

balancing is essential if your using new/different pistons and rods, they may be out with the original crank..