Im Fighting a guy who only has a Monster Right Hand

Your best bet is to circle to your right. I would suggest doing this- circling to the right- by moving your left foot first. Slide it to the right just a little bit, a couple inches, then pivot on it. The pivot controls the arc of your circle. Moving in this way keeps it tighter and keeps you closer to land your punches.
Also, I would suggest getting sideways to him, getting your left hip and shoulder out front. This gives you longer to see his right hand coming, and more options defensively to avoid getting hit with it.
Finally, I would recommend keeping your left hand low as you, sideways, circle to your right. This will invite him to throw the right hand, which he should be wanting to do anyway, it being his primary weapon. So encourage him to throw it. If you are circling as I described above, you will be increasing the distance his right hand has to travel to reach you, while decreasing the distance your right hand has to travel to reach him. You can turn him right into a right hand, go home early.

 

if i was you ,i would bring the right hand forward to the front of the chin in the first round just for defense & to keeping him thinking is right hand is canceled out ,in the mean time do what you need to do ,,seeing your have already sparred with him you know he has a strong right hand now you need to remember is weaknesses

(remember if you decide to protect the chin in this way you will be open for the left hook) thats why i say only for the first round it will give you time while he is thinking what to do

one last thing is you will need the flouting jab for this block ,,its just an idea of what i would do

good look

 

I was about to post those highlights as a guide for you actually

[ame]http://www.youtube.com/watch?v=GRREO4lj5D0[/ame]

Circling out either direction is sound advice.