the best thing i did was cut out my ifs. i ran hightravel arms for a year in that time i went through a ton of ft end parts. in the end i bent the lower control arm mounts on the frame and twisted the diff mount brackets. the control arms mounts was braced and the ft end was never locked. i ran my truck quite hard though through rocks but it only had 33s. i used to carry extra TREs,idler arms and pitman arms, both ft stubs and one axle. i never broke a axle but i was unlocked in ft.
tunda cvs BTW are the same just have a longer center shaft. as far as i know the inner and outer joints are the same.
BTW search for rockstompers ifs rig. he went through all kinda stuff trying to build a ifs setup that would hold up. custom arms, 9inch ft diff, porsche CVS. from what know he gave up cause he was tearing upper arm mounts off the frame.
not trying to discourage you here. just kinda stating that it has been tried before. ifs is good for mild wheeling but anything serious over time will destoy it.
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