416" harmonic balancer needed

exactly,since I already have the march pullies,I'd rather find a dampner that fits

I know what you mean. I searched high and low before I finally found one that fit right. The biggest problem is most only give an outside diameter so you don't know if they are the same thickness as stock.

Are you sure they didn't ship you a big block damper/balancer? They have a shorter snout, which sucks it into the timing cover. But it will fit on the crank!

I've been using Pioneer SFI neutral race balancers on my internally balanced 360 for years. Summit carries them and I believe Jeg's sells them under their label.

Summit: http://www.summitracing.com/parts/PIO-872037/

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?