Just bought a 1 1/4" front sway bar from a 64-72 GM a-body off a GTO.
Can I replace my small 3/4" or so front sway with this bar?? Will it Fit??
I paid $40 for the 1 1/4".

If so any problems when I go to convert my 67 malibu to 2" drop spindles/disk coversion and 18" wheels????

I think you'll be fine

The sway bar will bolt right on, just make sure you get some new bushings for it. The drop spindles willalso go right on, but you may need the offset upper shaft for it.