I think theyre somewhere around 53-56" long. Not sayiung thats too long for a front leaf, but thats a long ass spring to have in the front. Youd have to make some sort of god aweful hanger that sticks out way too far in order for your axle to be pushed forward enough to not hit your fender.
I was thinking of using them also becausse I also got offered a free set. If you got them to work im sure there would be LOTS of flex, just the lenght of them is kind of too much to work with.