Couple years ago I converted an old Meyer truck snow blade to fit SSQA. No trip feature. I only used it a couple times on the FEL before adding 3pt brackets and putting it on the rear. I use it with patience and caution. If doing it again I would rebuild and salvage the trip feature. I also built the swivel mechanism on a solid shaft, no chains and/or flexibility. I wouldn't do that again either.
So, yes, put a 3pt rear blade on your FEL and in float position you are putting a lot of weight on the blade cutting edge. To "jump" an obstacle it has to lift itself plus half of the weight of your FEL frame. As the old TV show Lost in Space would say "Danger Will Robinson".....