Yeah, drop beams. Only other option is to yank the whole front end and replace it with something else.
I saw this build and it made me want one. http://www.jalopyjournal.com/forum/showthread.php?t=722497&highlight=f100
The crown Vic is the way to go its alittle more then a bolt in. theres some links on you tube try 1969 f-100 swap
You could also just go under your truck with a torch and just cherry red the axel close to the wheel. You will see the truck start to drop. But don't go to far. slow and easy. also helps if you put wood blocks under the frame so it cant go to far.
Don't worry, I'm not dumb enough to use the torch "trick". Sent from my SCH-I535 using H.A.M.B. mobile app