Johnny,
More than likley, not.
I know the 33 Master chassis is not as wide as the 34 Standard chassis. There's not a great deal in the width distance, maybe about 1" inch, but how would this look, by not going right out to either sides of the fenders, I'm unsure. Would it pass registration??
Might be better to source out a 34 Master bumper as the 34 Master chassis is from what I was told, the same used on the 35 Standard.
Continuing on with your questions: My guess is you'd have to cut and reweld the brackets to make them suit.
I think this would be harder than what it sounds as the bumpers are 'bannana shaped', so you'd have to work out how the brackets are to be bent, so the bumper is equal distance from both fenders.