Correct harmonic balancer?

The 340 crank would of needed Mallory metal to balance it, probably 3 sticks. At $100.00 a stjj in close and $100.00 a pop to install them ur already at $600.00. I m ow this as I was gonna put in a 318 forged crank into a 340. It needed 3 sticks. Didn’t do it. Got a 340 crank coming. Kim