99 14 bolt sf w/ newer leafs. make my own hangers? or adapt stock 99 hangers?

[twich3136]

i have run into a problem trying to swap to a disc brake 99 14 bolt sf. and its not the brakes. lol the frame on the 99 is much wider than my 68 longhorn. i wanted to use the newer leafs (63" i believe) which is where my current problem is. there really isnt a lot of info out there for this. the hangers i can find are for toyota swaps which go right under the frame rails. these would work since i want it lifted a bit anyway however i see a huge stability problem moving the leafs so far under the frame. i thought about getting some stock 99 hangers and moving the leafs just outside the frame which might be the easiest way.
but what if i bring the hangers off the frame further to meet with the stock 99 perches on the axle?
i could throw in a home made cross member to keep it from flexing the frame but i still worry about putting that much rotational strain on that old frame.
i do have a class 5 curt receiver that i want to install too but thats another problem with clearance ha ha. it sticks so far forward from the edge of the frame rail i might have problems when the rear hanger moves back, itll be very close if not overlap.
anyone with fab experience able to chime in on this one?