Harmonic Balancers

I have a summit SFI balancer on the 318/390 stroker. It was reasonable, but chinese. Inside too close to raised timing letters, but not hanging up close, but too close for comfort. Pulleys didn’t line up worth a ****. Ac no ps crank pulley, single water pump pulley with a .5” spacer behind it. from a 400 and squareback alt with custom bracket. I have an ATI super damper for the 440, about 3x the price of the summit one, hopefully it justifies it’s cost