The old Tecumseh pressure washer is about to give up the ghost. Last year I bought a Predator engine for my wood splitter so I have a basically new Briggs 5hp just sitting around. I figured I'd use the old cart and fab a plate to bolt the Briggs to. I also bought this pump. Anything I'm missing? Seems simple enough way to get a $80 pressure washer. Not sure what the Briggs rpm is.