WOW, i dont even know where to start, maybe with stop being so cheap and pick up a mustang 2 front end set up to completly fit perfectly no questions asked with coil overs in it and call it a day. if its not low enough 1 - 2 maybe 3 (you decide) inches off the ground then put shockwaves (air bags) in it. two "Z-ing" the fram is completely unstable they do it on rat rods all the time and even if you box it, its still one peice ontop of another where something is gunna give. now let me get this straight your thinking about putting your cammaro front sub in your big f100 then basically "z" it, Unstable to the max. heavyer truck with a lighter frame, dude do it right the first time sometimes inovation takes a back seat to safety and this is just plain on safe. and if you dont have the money yet then wait just think of all the money youll be saving on medical bills when your front sub doesnt just fall out of the truck on a highway! im not trying to start stuff im just being honest.