vigalante LT1

iTrader: (4)

I bought a March Underdrive Pulley Set. The instructions show me that I need to add the stock harmonic balancer back onto the new unit. I understand that. My question is can I leave it off it seems unnecessary to have it. I have a 383 that is internally balanced. The new unit does not seem to have a weight added for balancing. Also even with a stock motor it is balanced internal front and external rear. It still would not make sense to have it on a stock motor when you use march's pulley. Help is appreciated. Let me know your opinions on this. Am I right or am I completely wrong and explain.

-Thanks.