Harmonic Balancers

That Pioneer looks an awful lot like the Powerbond balancer I have on my 540. It is supposed to be a good piece but because it is a lot thinner and closer to the block than a long snout ATI I have had troubles getting pulleys to align and also it hits the case front cover. I suggest getting an ATI balancer and know that customer support is just a call away as they are here in deadly Baltimore and answer their phone.