If the front end geometry is anything like my '68 you should figure out how high the front end is at the top end, then jack the car up to that height when adusting the tow. Otherwise it'll handle pretty evil. From static ride height to where the front sets at the top end changes tow about 3/8" or something crazy like that. I think when I set mine tow is zero to 1/32" in @ top end ride height