The Conjugate method necessarily implies that you are varying your main lifts more than 5/3/1 dictates. Furthermore, it would take you twice as long to complete a 5/3/1 cycle since you should be swapping the lower and upper body lifts as an ME movement every week.
If you are squeezing all lifts into one week, then I would presume you are adding higher % work to the “ME” lift. 5/3/1 for powerlifting already addresses this idea. Either approach sounds like a shitty idea to me, since you are diluting the admittedly slow gains of 5/3/1 and/or effectively nullifying the primary intent of the conjugate method.
If you want to add speed work to 5/3/1, I’m sure that’s been covered ad nauseam in the 5/3/1 forum or in the books. Also, the cube method, as others have mentioned, resembles 5/3/1 and incorporates speed work.
If you are concerned about the conjugate method not being suitable for raw lifters, the most drastic change you should make is replacing speed work with competition-style rep work. I’ve also seen some people advocate upping the % on speed work for raw lifters.
In any event, fusing two entirely different training methods is typically the bailiwick of the beginner. Is that you?