Another pulley question

No

Dartvader440gt said

IS there a difference in the 360 harmonic balancer thickness compared to the 273/318/340?

Click to expand...

As far as where the pulley mounting surface is no. Only the Fluidamper's are thicker.. If you use a Fluidamper on a aluminum water pump engine 1970 and newer. You would use a 1969 and earlier lower crank pulley so the alignment is correct. I have seen the 1969 and earlier pullies use on the 1970 and later dampers with a spacer. They are smaller and act as an underdrive.