440 HP(Six pack rods)

Ok can someone explain something to me.

I have 6 pack rods but the balancer I have is a standard forged balancer. I understand these take a special weighted balancer. Do I have any other options here?

I'm sure. Lookin in the Summit book, they all are the same. Internally balanced. I have no doubt a good machine shop could make whatever balancer you want on it to work. You're gonna balance it anyway, right? It seems like i have heard somethin similar to what you're talkin about here. Try callin Summit. they should be able to tell you. If not them, then year one for sure.