Quote Originally Posted by dalejunior88fan View Post
Hello all,
I am installing a HAMPTON 671 Blower on my 350 small block. Everything is straight forward but I do have one question. I have been told to have my crank and balancer double keyed. Is this absolutely necessary? I don't plan to buzz this motor too high since i only have a ten bolt rear end.
Also, be sure you have an internally balanced balancer. Aftermarkets are sometimes hard to tell the difference between dampeners. A 400 balancer w/ come apart. SBC's have extremely short snouts. Be sure to pin or cut two keyways. I learned the hard way on somebody elses motor, but he bought the Austrailian 400 balancer and I didn't see the small 400 engraved in it until it lunched the shaft. Its hard not to zing up a blower motor. Too much fun. Start looking for some axles now! Billy