I believe it's used on a cast crank! Small block maybe! No listing with that number for big blocks 62-75Have a harmonic balancer #83184-250-1 came with a couple cars I bought saw the offset weight on front ,what does it go to?
View attachment 939531 View attachment 939532
6-packs have a thinner counter weight. Close though.It could also be a 440 6 Pack one. I would think the extra counter weight was there from the factory because of the heavier connecting rods.
Someone here will know for sure.