Cut It Close,
Look under the spindle pulley at the top of the spindle, if it is a 71460114 then there will be a cap on top of the spindle that spins with the shaft. When the old deck has the baffle installed the blade height (cutting edge to top of wing section) should be split in half by the lower edge of the baffle. If a 71460114 is in the deck then it does use 2 blade spacers in its set up but that should still be a 3" cut height. Sounds like the right coil is bad and the engine is only running on the one cylinder.