If you put the wheels on with used tires, and the used tires have a wear pattern, it may have that effect. I got some 10 holes and put them on my 82 in place of some TRX's, that are narrower, and since the tires were worn in the middle previously, when I put in normal air pressure, they seemed to ride on the edges and did want to dart around a bit.
More air fixed it mostly. New tires on front might fix it.
I just had my 89 2.3 LX aligned, and with the badly worn tires on front, it still pulled to the left. Two hours later with some new 195-75-14s it drives straight as an arrow. My 10 hole installation is on hold for a while.