New pistons / re-balance?

Hey I got a stock 360 crank with h beam rods and weisco forged pistons. I haven’t got a balancer or flex plate yet, do you recommend getting neutral? I’m new to this too. I plan on running it at the track mostly.
The stock 360 was externally balanced, so no I wouldn't recommend it unless you get it balanced internally. You should get it balanced since you've changed pistons and rods.