im putting my motor together and my bddy said that it would be good for me to ge the rotating assembly balanced ivegot probe forged pistions and eagle rods and a stock ls crank,8lb flywheeland stock crank pully the guy at the machine shop said 450.00 to balance every thing is this needed or will i be ok

 

450 is a lot. im getting my motor balanced for 150.

 

balance the pistons and rods urself using a digital scale
i wouldnt touch the crank unless there was something wrong with it, ive had bad experiences