416" harmonic balancer needed

Man that's a heck of a good price on a SFI rated balancer. Is it the same thickness as a stock balancer so it doesn't affect the pulley alignment?

I can't say for sure because I never compared the two. I've run a Moroso aluminum lower pulley with a belt to the alternator and electric water pump ever since I started using them.
I don't have an accurate way to measure for a comparison to an OEM balancer while the Pioneer is on the engine! But they also make OEM replacement balancers so they should know the proper offset.