Spindles

[DGreimel@aol.com]

Bretheren Moggers:
Could anyone tell me what the difference is between the + 8 spindles and 
those that are on my ~66 4/4.  I know that the metalurgy was lousy in the 
older cars but is there something else?  Simply heat treating the older 
spindles cured them of the flex and break habit yet I see cars advertised as 
having + 8 spindles as though they are something special.
Thanks:
Don