blown 69 camaro

I have a small block chevy, punched 30 over, 6-71 blower, 8 to 1 comp. about 8 lbs boost, runs srong very quick response, problem i'm having is my woodruff key on my balancer when i get on it, it shears that sucker.
any thoughts?


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single key im betting!
if your crank isnt prepped for blower IE 2 keys youll be shearing them until you get it fixed.
botom line is you NEED a crank with a blower snout on it. patterned after the big block which has 2 keyways.
and balancer to match.
people think you can just bolt on a roots style blower on a stock small block motor but it just isnt true.
the crank snout is one of those things that IS needed.
to fix the crank gotta come out and a keyway machined into it.
or buy a crank with both keyways already cut.

thanks for the info I was informed of that you just now confirmed it. Thanks

no problem