xj bastard pack with yj stock front springs

has anyone ever used stock yj front springs to make a xj bastard pack the reason i say the fronts is that i figured they were stronger to deal with the engine weight i have front and rear stock yj springs and considered using the longest springs from front and back cut to size with the rest of the front springs with my xj main to make my xyj bastard pack from i am tring to get 3 to 4 inches of lift ,any thoughts on this would be helpful

you can use any leaf 2.5" wide.

thanks, i knew you could use any of the 2.5 springs i should have asked a more detailed question such as flex and how stiff it was if they used this setup. i know it wont be like a re leaf but just curious as to how it rode, my bad ,but thanks for the reply.