2 things

[spareparts]

you shouldn't have to change anything other than the exhaust pipe to the transom plate. Either transom plate has the same dimensions, check the spread of the motor mounts with a tape measure, they should be the same. They standardized most of the transom assembly back in 84. As far as timing goes, run no more than 5 degrees initial, I can't remember what the total was, but they had a service bulletin saying to set all the 3.7 to 5 initial. While you have the point plate off, check the advance weights and springs.