im looking to run 42" tires on my 77. currently it has a high-boy suspension on it (its not a high-boy, i think somebody just swapped the suspension). anyways, with the high-boy suspension, i can BARELY fit 35's. they tend to rub the fenders a little bit. im curious to know what size lift i need to accomodate atleast a 40" tire. im thinking 10" but id like to know from somebody that has done this. second of all, if i do need bigger than a 7" lift, how do i go about finding this? ive searched online and 7" is the biggest i can find. any help is greatly appreciated, thanks in advance.